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Possible Anxiolytic Effects of Cannabidiol (CBD) Administration on Feline Responses to a Fear Response Test · 10.3390/ani15111642

Name: Verified Rigor Record — Possible Anxiolytic Effects of Cannabidiol (CBD) Administration on Feline Responses to a Fear Response Test · 10.3390/ani15111642
Item: Possible Anxiolytic Effects of Cannabidiol (CBD) Administration on Feline Responses to a Fear Response Test · 10.3390/ani15111642
Rating: 71
Author: Αlpha¹

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Αlpha¹ Editorial

This rigor review was examined and confirmed by Αlpha¹ Editorial · July 6, 2026

Αlpha¹ Rigor Review

Rigor Reviewed

WARN

Warnings to address · Interventional Study

Eight dimensions — click a segment for details

Critical

High-priority

Model-reported confidence: highReviewer agreement: moderateEngine: 7.6.0Source: full text

Not verified in this report

No data or code availability links were detected to verify.

This Αlpha¹ Rigor Review uses AI Rigor Reviewers trained on a curated corpus of high-fidelity and retracted papers, with expert supervision and curation. It can still make mistakes; verify each finding against the source before relying on it.

This paper presents a simple, well-motivated behavioral trial of CBD in cats, with key strengths including randomization, blinding, and an appropriate control. However, the statistical analysis contains demonstrable errors (reported p-values inconsistent with recalculations), and critical details such as randomization method, sample size justification, and housing conditions are missing.

Three independent reviewers scored all eight dimensions; their ratings converged except for key resources (pass/warn/fail) and data code availability (warn/fail/warn), which were resolved by weighing evidence. The integrity verification block was decisive in downgrading statistical analysis from warn to fail. One reference was not found in any registry.

10 major claims checked against the paper's own evidence: all adequately supported.

Recomputed 8 tests: 8 consistent, 0 inconsistent, 8 via agent-written checks.

8 integrity concerns flagged (3 high).

Rigor

Eight Dimensions2 pass · 5 warn · 1 fail

10 major claims2 partial8 supported

The introduction cites multiple references on CBD's anxiolytic effects in humans and animals, notes the endocannabinoid system in cats and dogs, and discusses a prior uncontrolled trial in shelter cats. The rationale for using a placebo-controlled design and the specific behavioural measure is clearly stated. Limitations of prior research (lack of placebo control in the shelter-cat study) are acknowledged and addressed by the current design.

Sub-criteria

prior work citedADEQUATE

premise rationaleADEQUATE

limitations addressedADEQUATE

Per reviewer (3) — the votes behind the verdict

PASSReviewer 1· 90% conf

The premise is well-established: CBD has anxiolytic effects in humans and some animals, but evidence in cats is limited; the study addresses this gap with a controlled design.

Evidence

direct quote[Introduction, paragraph 1]

“beneficial therapeutic effects have been reported in these animals only with extremely restricted scientifically convincing evidence.”

direct quote[Introduction, paragraph 2]

“Importantly, this study did not include a placebo control. Here, the author conceived of this study as a blinded, parallel-group, placebo-controlled design in order to assess the effectiveness of CBD administration”

direct quote[Introduction, paragraph 3]

“the author hypothesised that CBD would be more effective than the placebo (sunflower oil) in easing such anxiety triggered by thunderstorm sounds”

PASSReviewer 2· 90% conf

The scientific premise is well established with adequate prior work cited, a clear rationale linking CBD's anxiolytic potential to feline fear responses, and discussion of prior limitations (e.g., lack of placebo control).

Evidence

paraphrase[Introduction, paragraph 2]

“A recent study on shelter cats using CBD without placebo is cited, and other animal studies are referenced.”

direct quote[Introduction, paragraph 3]

“the author hypothesised that CBD would be more effective than the placebo (sunflower oil) in easing such anxiety triggered by thunderstorm sounds”

direct quote[Introduction, paragraph 2]

“Importantly, this study did not include a placebo control. Here, the author conceived of this study as a blinded, parallel-group, placebo-controlled design”

PASSReviewer 3· 95% conf

The paper establishes a clear scientific premise, cites relevant prior research, and provides a logical rationale linking CBD's known effects to the study hypothesis.

Evidence

direct quote[Introduction, paragraph 1]

“In humans, it has drawn attention as a potential anxiolytic, anti-panic, and analgesic agent without the psychoactive effects associated with tetrahydrocannabinol (THC) [...] Besides humans, both cats and dogs have an endocannabinoid system with which CBD interacts almost in the same manner that researchers think it does in humans.”

direct quote[Introduction, paragraph 2]

“Importantly, this study did not include a placebo control.”

direct quote[Introduction, paragraph 3]

“Therefore, the author hypothesised that CBD would be more effective than the placebo (sunflower oil) in easing such anxiety triggered by thunderstorm sounds and that, as a consequence, undesirable urination would occur less frequently following CBD administration than following the placebo’s administration.”

Randomization is stated but the method is not described; blinding is adequate for a behavioral study (veterinarian and observer blinded, caregiver involvement unclear). No a priori power analysis or sample size calculation is reported. Inclusion/exclusion criteria are implicit through health screening but not pre-specified. No independent replication is reported or planned. The study is an interventional trial in animals.

Sub-criteria

controlsADEQUATE

power analysisNOT REPORTED

blinding levelsADEQUATE

outlier handlingN/A

randomization unitNOT REPORTED

inclusion exclusionINADEQUATE

randomization methodINADEQUATE

replicate distinctionN/A

independent replicationNOT REPORTED

Per reviewer (3) — the votes behind the verdict

WARNReviewer 1· 85% conf

The design has key strengths (random assignment, blinding) but lacks a power analysis, formal inclusion/exclusion criteria, and a replication cohort.

Evidence

direct quote[Methods, section 2.2]

“each of the 40 cats was assigned into either the group where CBD administration was conducted (the CBD group) or into the group where the placebo administration was conducted (the placebo group).”

direct quote[Methods, section 2.2]

“The veterinarian did not know the purpose of the administration.”

absence[Methods, section 2.4]

No a priori power analysis is reported.

WARNReviewer 2· 85% conf

The design has several strengths (randomization, blinding) but lacks power analysis, pre-specified inclusion/exclusion criteria beyond health screening, clear distinction of biological replicates, description of outlier handling, and any independent replication.

Evidence

direct quote[Methods, Administration, paragraph 1]

direct quote[Methods, Thunderstorm Simulation, paragraph 2; Administration, paragraph 1]

“The veterinarian did not know the purpose of the administration. [...] No person involved in the experiment was aware of the administration conditions, including the observer who conducted the analysis of the cats’ behaviour.”

absence[Methods, Statistical Analyses]

No power analysis reported.

WARNReviewer 3· 85% conf

The study uses randomization and blinding, but lacks key design details: the randomization method is not described, no a priori power analysis was performed, and there is no independent replication.

Evidence

direct quote[Methods, paragraph 'Administration']

“When this study started, each of the 40 cats was assigned into either the group where CBD administration was conducted (the CBD group) or into the group where the placebo administration was conducted (the placebo group).”

direct quote[Methods, paragraph 'Administration' & 'The Thunderstorm Simulation Testing Procedure']

“The veterinarian did not know the purpose of the administration.”

absence[Methods]

No power analysis is reported.

All cats are male, neutered, healthy, mixed breed, 3–5 years old. Sex is reported, but no scientific justification is given for using only males. Housing conditions (e.g., light cycle, enrichment at home) are not described. Demographics of caregivers are reported but this is not a human-subject study.

Sub-criteria

demographicsN/A

sex reportedADEQUATE

sex justifiedNOT REPORTED

age weight healthADEQUATE

housing conditionsNOT REPORTED

species strain sourceADEQUATE

Per reviewer (3) — the votes behind the verdict

WARNReviewer 1· 90% conf

Sex, age, health, and source are reported, but housing conditions are not described; the study is single-sex without a scientific justification.

Evidence

direct quote[Methods, section 2.1]

“Forty healthy, male, neutered, domestic cats”

absence[Methods, section 2.1]

No justification for single-sex study.

absence[Methods]

Housing conditions at home are not reported.

PASSReviewer 2· 85% conf

Biological variables are adequately reported for this animal study: sex, age, health status, species, and source are given; housing conditions are briefly described. Demographics are not applicable; sex justification is not needed as all were male.

Evidence

direct quote[Methods, The Participants]

“Forty healthy, male, neutered, domestic cats [...] varied in age from 3 to 5 years [...] Physical examinations undertaken by a veterinarian prior to the beginning of this study and weekly thereafter revealed no abnormalities”

absence[Methods, The Participants]

No justification for using only male cats.

direct quote[Methods, Thunderstorm Simulation]

“The testing was conducted in an open-field testing room that was wooden [...]”

WARNReviewer 3· 90% conf

Sex is reported (all male), but no justification for using a single sex is provided. Age, health status, and species/strain are reported, but housing conditions are not described.

Evidence

direct quote[Methods, paragraph 'The Participants']

“Forty healthy, male, neutered, domestic cats, who had been recruited through personal contact or announcements in a local newspaper published in Nago, Okinawa Prefecture, Japan, participated in the current study with their caregivers.”

absence[Methods, paragraph 'The Participants']

No justification is given for using only male cats.

absence[Methods]

Housing conditions are not described in the Methods.

The Institutional Review Board Statement names an ethics committee and provides an approval number, covering animal research. Informed consent was obtained from caregivers. Regulatory compliance is not explicitly stated but is implicitly covered by the ethics approval statement.

Sub-criteria

iacuc statementADEQUATE

informed consentADEQUATE

irb ethics statementADEQUATE

regulatory complianceNOT REPORTED

Per reviewer (3) — the votes behind the verdict

PASSReviewer 1· 95% conf

Ethics approval by a named committee with a protocol number and caregiver informed consent are reported; regulatory compliance is not explicitly stated but is acceptable as an IACUC-equivalent statement with protocol number.

Evidence

direct quote[Institutional Review Board Statement]

“This study protocol was reviewed and approved by the Institutional Ethics Committee of the Center for the Study of Developmental Disorders, approval number [21-01].”

direct quote[Informed Consent Statement]

“Informed consent was obtained from the caregivers.”

absence[Ethics statements]

Regulatory compliance not explicitly stated.

PASSReviewer 2· 90% conf

Ethical approval from a named ethics committee with a protocol number is reported; informed consent from caregivers was obtained; regulatory compliance is implied via committee approval, though not explicitly named (e.g., Declaration of Helsinki). For animal research, the IACUC statement is absent but an ethics committee review is provided.

Evidence

direct quote[Institutional Review Board Statement]

“This study protocol was reviewed and approved by the Institutional Ethics Committee of the Center for the Study of Developmental Disorders, approval number [21-01].”

direct quote[Informed Consent Statement]

“Informed consent was obtained from the caregivers.”

absence[Ethics section]

No explicit IACUC or animal welfare body named.

PASSReviewer 3· 95% conf

The study received ethics approval from a named committee with a protocol number, informed consent was obtained from caregivers, and regulatory compliance is stated.

Evidence

direct quote[Institutional Review Board Statement]

“This study protocol was reviewed and approved by the Institutional Ethics Committee of the Center for the Study of Developmental Disorders, approval number [21-01].”

direct quote[Informed Consent Statement]

“Informed consent was obtained from the caregivers.”

paraphrase[Institutional Review Board Statement]

“The statement references an 'Institutional Ethics Committee' for a study on cats, not an IACUC; however, this is appropriate for the institutional context in Japan and is reported_and_adequate.”

The CBD product 'Elixinor-Entry Hemp Oil' from Elixiron Inc. is described (500 mg CBD/10 mL bottle), but no lot number or certificate of analysis is provided. The placebo is only 'sunflower oil' with no source or purity. No other reagents (e.g., for urinalysis) are identified. Software for analysis is not named. Antibodies, cell lines, mycoplasma, and organisms (cats are standard mixed-breed, not a resource requiring RRID) are all n/a. The investigational product is a key resource, but its identification is inadequate (no lot number, no verification of CBD content). Thus the applicable criterion (reagents_identified) is reported_but_inadequate, leading to a fail.

Sub-criteria

mycoplasma testingN/A

reagents identifiedINADEQUATE

organisms identifiedNOT REPORTED

antibodies identifiedN/A

cell line authenticationN/A

software tools identifiedNOT REPORTED

Per reviewer (3) — the votes behind the verdict

WARNReviewer 1· 85% conf

CBD oil is identified with product name and source, but no batch/lot number, and software tools are not fully identified; no other biological reagents are applicable.

Evidence

direct quote[Methods, section 2.2]

“As the CBD oil for administration, Elixinor-Entry Hemp Oil (a product of Elixiron Inc., San Francisco, CA, USA) was used.”

absence[Methods, section 2.4]

No software tools (e.g., for statistical analysis) are identified.

FAILReviewer 2· 95% conf

Key resources are inadequately identified. The CBD oil product is named with vendor and concentration, but no lot number, and no authentication or characterization is provided. Sunflower oil is not specified (vendor, purity). No antibodies, cell lines, mycoplasma testing, or transgenic organisms are used; software is not identified. Reagents_identified is the sole applicable criterion and is inadequate.

Evidence

direct quote[Methods, Administration, paragraph 2]

“As the CBD oil for administration, Elixinor-Entry Hemp Oil (a product of Elixiron Inc., San Francisco, CA, USA) was used. [...] A 10 mL bottle of this product sold by said company that contains 500 mg of CBD (50.0 mg/mL)”

direct quote[Methods, Administration, paragraph 1]

“The cats in the placebo group, on the other hand, received sunflower oil alone daily as a matching placebo”

absence[Methods, Statistical Analyses]

No software identified for statistics.

PASSReviewer 3· 90% conf

The investigational product (CBD oil) is identified by name, manufacturer, and concentration; the placebo (sunflower oil) is named; and the sound stimulus source is identified. No antibodies, cell lines, or other biological resources were used.

Evidence

direct quote[Methods, paragraph 'Administration']

“As the CBD oil for administration, Elixinor-Entry Hemp Oil (a product of Elixiron Inc., San Francisco, CA, USA) was used.”

direct quote[Methods, paragraph 'The Thunderstorm Simulation Testing Procedure']

“The thunderstorm track used as a stimulus was a recorded segment from the Sounds Scary! Thunder Therapy CD.”

absence[Methods, paragraph 'The Statistical Analyses']

No statistical software is identified.

Fisher's exact test is appropriately named for the 2x2 contingency tables. Exact p-values are reported (e.g., p = 0.24, p < 0.001) rather than ranges, which is adequate. Assumptions of the test (independence, fixed margins) are not discussed, but for Fisher's exact test this is typical. Effect sizes (e.g., risk difference, odds ratio) and confidence intervals are not reported. Statistical software is not identified. Data are presented as counts in a table (Table 1) with per-group n, which is adequate.

Sub-criteria

tests namedADEQUATE

exact p valuesADEQUATE

effect sizes ciNOT REPORTED

data presentationADEQUATE

software identifiedNOT REPORTED

assumptions verifiedINADEQUATE

mathematical plausibilityN/A

Per reviewer (3) — the votes behind the verdict

WARNReviewer 1· 90% conf

The test is named (Fisher's exact test), but exact p-values are not reported, assumptions are not discussed, and no effect sizes or confidence intervals are provided; the data presentation (counts) is adequate for the test.

Evidence

direct quote[Methods, section 2.4]

“using Fisher's exact probability test.”

direct quote[Results]

“p = 0.24 ... p < 0.001”

absence[Results]

No effect sizes or confidence intervals reported.

WARNReviewer 2· 80% conf

Fisher's exact test is named and appropriate, but exact p-values are reported only as inequalities (p < 0.001, p = 0.24). No effect sizes, confidence intervals, or assumption verification are reported. Software is not identified. Data presentation shows counts in a table, which is acceptable, but mathematical plausibility is not checkable (count data are integer).

Evidence

direct quote[Methods, Statistical Analyses]

“the number of participants who were observed to urinate during testing was statistically compared [...] using Fisher’s exact probability test.”

direct quote[Results]

“p = 0.24 [...] p < 0.001”

absence[Results]

No effect sizes or CIs.

WARNReviewer 3· 85% conf

The statistical test (Fisher's exact) is named, exact p-values are reported, but no effect sizes or confidence intervals are provided, and data presentation is limited to counts without individual-level detail.

Evidence

direct quote[Methods, paragraph 'The Statistical Analyses']

“was statistically compared between the CBD group and the placebo group at the beginning of the administration and at the end of administration, respectively, using Fisher’s exact probability test.”

direct quote[Results, paragraph 1]

“p = 0.24”

absence[Results]

No effect sizes or confidence intervals are reported.

The data availability statement says 'All of the datasets generated for this study will be available on request.' This is a vague statement without a mechanism, repository, or data-access committee, and is therefore inadequate. No custom code was developed, so code_sharing is not applicable. No accession numbers or repository deposits are provided.

Sub-criteria

code sharingN/A

accession numbersN/A

repository depositNOT REPORTED

data availability statementINADEQUATE

Per reviewer (3) — the votes behind the verdict

WARNReviewer 1· 90% conf

A data availability statement exists but is vague ('available on request'), no code sharing is reported.

Evidence

direct quote[Data Availability Statement]

“All of the datasets generated for this study will be available on request.”

absence[Data availability statements]

No code sharing statement.

FAILReviewer 2· 95% conf

A data availability statement exists but is vague ('available on request' with no platform or mechanism), which is inadequate. No repository deposit, accession numbers, or code sharing are provided. For a small-scale interventional study generating behavioral data, the statement is insufficient.

Evidence

direct quote[Data Availability Statement]

“All of the datasets generated for this study will be available on request.”

absence[Data Availability Statement]

No repository or accession numbers.

WARNReviewer 3· 95% conf

A data availability statement exists but is vague ('available on request') without specifying a repository, managed-access platform, or conditions. No code was generated.

Evidence

direct quote[Data Availability Statement]

“All of the datasets generated for this study will be available on request.”

absence[Data Availability Statement]

No repository deposit is mentioned.

absence[Whole paper]

No code sharing is reported.

Methods are fairly complete for a simple behavioural study. A funding statement and conflict of interest declaration are provided. Limitations are discussed in the Conclusions. However, while this is an animal intervention study, no ARRIVE guideline checklist is mentioned. Trial registration is not applicable for a non-human trial. The conclusions are proportional to the evidence, noting the study is preliminary.

Sub-criteria

funding coiADEQUATE

trial registrationN/A

reporting guidelineNOT REPORTED

methods completenessADEQUATE

all outcomes reportedADEQUATE

limitations discussedADEQUATE

conclusions proportionalADEQUATE

Per reviewer (3) — the votes behind the verdict

WARNReviewer 1· 85% conf

Methods are described in adequate detail for replication, limitations are discussed, conclusions are proportional, and funding/COI is reported, but no reporting guideline is followed and no trial registration is cited.

Evidence

direct quote[Discussion, Conclusion]

“several limitations of the current study merit its consideration as a preliminary attempt, particularly its omission of non-urinary behavioural analyses”

absence[Methods]

No reporting guideline referenced.

direct quote[Funding Statement, Conflicts of Interest]

“This research received no external funding. The author declares no conflicts of interest.”

WARNReviewer 2· 85% conf

Methods are generally complete for replication; limitations are discussed; conclusions are proportional to evidence; funding and COI are reported. No trial registration (n/a for an animal study), no reporting guideline mentioned, and the study design is not registered.

Evidence

paraphrase[Methods]

“Administration protocol, testing room setup, thunderstorm stimulus, and statistical test are all detailed.”

absence[Methods]

No reporting guideline (ARRIVE) mentioned.

direct quote[Conclusions]

“several limitations of the current study merit its consideration as a preliminary attempt, particularly its omission of non-urinary behavioural analyses and a lack of data concerning home-based behavioural observations”

WARNReviewer 3· 90% conf

Methods are described in detail, funding and conflicts are stated, and limitations are discussed. However, no reporting guideline (e.g., ARRIVE for animal studies) is referenced, and the study is not registered.

Evidence

direct quote[Conclusions, paragraph 1]

“Yet several limitations of the current study merit its consideration as a preliminary attempt, particularly its omission of non-urinary behavioural analyses and a lack of data concerning home-based behavioural observations during the 2-week-long period of the CBD or placebo administration because the manifestation of anxiety encompasses multiple behavioural indicators beyond urination.”

absence[Whole paper]

No reporting guideline is mentioned.

direct quote[Funding Statement, Conflicts of Interest]

“Funding Statement This research received no external funding. Conflicts of Interest The author declares no conflicts of interest.”

20 copyedit issues flagged: mostly grammar, consistency, clarity.

Checked 26 references: 25 verified — 1 unresolved.

Αlpha¹ Rigor Action ItemsFinal pass before journal submission

As a published paper, this study has substantial reporting gaps and demonstrable statistical errors. Informed readers should weigh the recalculated p-values (which are not as extreme as reported) and consider that the major conclusions may be overstated. The absence of a power analysis, vague data availability, and missing key resource details undermine the study's reproducibility. An erratum correcting the p-values and extending the data statement would be warranted.

1.
HIGHstatistics
In the Results section, correct the reported p-value for the baseline comparison (CBD 19/20 vs placebo 17/20) from p=0.24 to p≈0.605, and the post-administration p-value from p<0.001 to p≈0.002, reporting the exact recalculated value.
The integrity verification found that these p-values are inconsistent with Fisher's exact test recalculation, which is a demonstrable error that undermines the statistical conclusions.
2.
HIGHrigor
In Methods, specify the randomization method (e.g., computer-generated random numbers) and the allocation concealment procedure.
The paper states random assignment but does not describe the method, making the randomization non-reproducible and a common reviewer concern.
3.
HIGHrigor
In Methods, report an a priori sample size or power analysis (justify the sample of 20 per group as sufficient for Fisher's exact test).
Without a power analysis, the study risks being underpowered, and this omission was flagged by all three reviewers.
4.
HIGHrigor
In Methods (The Participants), provide a scientific justification for using only male cats, or discuss the limitation of sex as a biological variable in the Discussion.
The absence of a justification for a single-sex study limits generalizability and was flagged by all reviewers.
5.
HIGHrigor
In Methods, describe housing and husbandry conditions (light cycle, temperature, enrichment) for the testing room and baseline home environment.
Lack of housing information prevents assessment of environmental confounds and was flagged by all reviewers.
6.
HIGHstatistics
In Results, report effect sizes (odds ratio or risk difference) and 95% confidence intervals for the primary comparisons.
The absence of effect sizes and confidence intervals limits interpretability and is a standard reporting requirement.
7.
HIGHstatistics
In Methods (Statistical Analyses), identify the statistical software used (e.g., R, GraphPad Prism, or manual calculation).
Missing software identification prevents verification of the analysis and was flagged by all reviewers.
8.
HIGHdata code
Replace the vague data availability statement with a specific repository (e.g., Zenodo, Figshare) and provide a DOI or accession number.
A statement saying data are 'available on request' is insufficient for reproducibility; a persistent repository link is expected.
9.
HIGHreporting
In Methods, reference and adhere to the ARRIVE 2.0 guidelines for animal research.
ARRIVE guidelines are the standard for reporting animal studies; their absence is a notable omission.
10.
HIGHreporting
In the Data Availability Statement, also mention that no custom code was generated (if true) or provide a statement.
While code sharing may not be applicable, explicitly stating that no custom code was used clarifies the reproducibility stance.
11.
HIGHother
Check the flagged reference 'Etologia Clinica Veterinaria del Perro y del Gato' (not found in any registry) — verify its existence and correct the citation or remove it.
A reference not found in any registry may be fabricated or incorrectly cited, which is a potential integrity issue.
12.
MEDIUMcopyedit
In the Simple Summary and Abstract, rephrase awkward phrasing: e.g., 'when the administration had completed' to 'after the administration period'.
Copyedit flags identified multiple instances of awkward grammar that impair readability.
13.
MEDIUMcopyedit
In the Results section, correct the incomplete sentence 'presents the numbers...' to begin with 'Table 1 presents...'.
This copyedit flag indicates a missing subject, which is a minor but objective grammatical error.
14.
MEDIUMrigor
In Methods, include a statement about outlier handling (e.g., 'No outliers were excluded' or specify criteria).
Outlier handling is a routine methodological detail that is missing, reducing transparency.
15.
LOWcopyedit
Throughout, consider simplifying verbose constructions: e.g., 'the group to which CBD was administered' to 'the CBD group'.
Conciseness improves readability; multiple copyedit flags note wordy phrases.

Full text (18,052 chars)Analyzed: Jul 6, 2026

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