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Raw Feeding: Risks and Evidence

 

Evidence review summarizing microbiological, parasitological, nutritional, and public health findings associated with raw meat–based diets in companion animals.

Evidence Position Summary

 

  • Peer-reviewed literature documents consistent detection of microbiological and parasitological hazards associated with raw meat–based diets for dogs and cats.

  • The evidence base primarily consists of observational studies, laboratory analyses, surveys, and narrative reviews rather than controlled feeding trials.

  • Pathogen presence in raw pet foods and fecal shedding in exposed animals demonstrate exposure pathways, not confirmed clinical disease causation.

  • Owner-reported data describe perceptions and handling behaviors rather than verified biological outcomes.

  • Evaluations of nutritional adequacy and hygiene quality identify substantial variability across commercial and homemade raw formulations.

What This Evidence Page Covers

 

This evidence page synthesizes peer-reviewed findings on raw-meat–based feeding in dogs and cats, including microbiological contamination, parasitological exposure, antimicrobial resistance, nutritional adequacy, owner-reported practices, and environmental considerations. Ethical arguments, feeding guidance, regulatory recommendations, and consumer decision-making remain outside the scope.

Veterinary Diet Decision Framework for Dogs

A clinical resource from VetFarmacy’s Evidence Library

 

Veterinary nutrition research—especially topics like raw feeding, fresh diets, and home-prepared diets—can be difficult to interpret.

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This downloadable clinical guide explains how veterinarians evaluate dog diets using scientific evidence rather than marketing claims or anecdotal reports.

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Inside the framework you will learn how veterinary professionals assess:

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• raw feeding safety and microbiological risk
• nutritional adequacy of fresh and home-prepared diets
• evidence quality in pet nutrition research
• ingredient marketing claims vs scientific data
• diet safety and nutritional completeness

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​Free evidence-based PDF • Created for veterinarians,

veterinary students, and science-minded pet owners

Evidence Breakdown

 

Microbiological Hazards

 

Laboratory-based investigations and narrative reviews identify frequent contamination of raw pet foods with zoonotic bacteria, including Salmonella spp., Listeria monocytogenes, Campylobacter spp., Clostridium perfringens, and Clostridioides difficile (Davies et al., 2019; Fredriksson-Ahomaa et al., 2017; Viegas et al., 2020; Begić et al., 2025).

 

Studies assessing antimicrobial resistance report associations between raw feeding exposure and detection of extended-spectrum beta-lactamase–producing Enterobacteriaceae in household pets (Baede et al., 2017; Nüesch-Inderbinen et al., 2019).
 

 

Recent surveillance literature documents detection of highly pathogenic avian influenza H5N1 genetic material in raw pet food products and raw milk, highlighting emerging biosecurity considerations (Dhakal et al., 2025).

 

Parasitological Findings

 

Parasitological and molecular investigations link raw meat feeding to exposure to helminths and protozoa in dogs and cats, with environmental dissemination reported in multi-pet households (Tuska-Szalay et al., 2024).

 

Narrative reviews further characterize raw diets as a potential contributor to the circulation of domestic and urban parasites, emphasizing One Health relevance rather than clinical incidence or disease burden (Ahmed et al., 2021).

 

Nutritional Adequacy and Product Variability

 

Analytical assessments of commercial raw pet foods identify inconsistent macronutrient balance, micronutrient sufficiency, and hygiene quality across evaluated products (Vecchiato et al., 2022; GÅ‚ówny et al., 2024).

 

Comprehensive reviews emphasize that assertions of health benefits lack confirmation from controlled feeding trials that measure objective clinical or physiological endpoints (Freeman et al., 2013; Schlesinger & Joffe, 2011).

 

Owner-Reported Practices and Risk Perception

 

Survey-based and netnographic studies describe owner-reported motivations, food handling behaviors, and perceived risks associated with raw feeding practices (Anturaniemi et al., 2019; Empert-Gallegos et al., 2020; Ovca et al., 2024).

 

These datasets rely on self-reported information and characterize associations between beliefs and behaviors rather than verified exposure outcomes or health effects (Bulochova & Evans, 2021a; Bulochova & Evans, 2021b).

 

Longitudinal observational analyses document increasing prevalence of raw feeding over time without concurrent assessment of clinical outcome measures (Dodd et al., 2020).

Primary Literature Summary

 

The available evidence base consists predominantly of narrative reviews, laboratory contamination studies, molecular surveillance, cross-sectional surveys, and observational cohort analyses. Randomized or controlled feeding trials evaluating clinical health outcomes associated with raw meat–based diets remain absent. The literature primarily addresses hazard identification, exposure pathways, and perception analysis rather than causative health effects.

Clinical Interpretation (Non-Prescriptive)

 

From a clinical evidence perspective, raw meat–based diets are documented sources of exposure to microbiological and parasitological agents under laboratory and observational conditions. Reported associations describe pathogen presence, environmental dissemination, and fecal shedding rather than disease causation. Owner-reported data provide contextual understanding of handling behaviors and beliefs, but they lack objective verification. Evidence regarding nutritional benefits remains inferential due to the absence of controlled outcome studies.

How Veterinarians Evaluate Raw and Fresh Diets

 

Evidence about raw feeding often includes microbiological risks, nutritional variability, and observational research findings.

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This downloadable clinical framework explains the structured method veterinarians use to evaluate diet safety, nutritional adequacy, and scientific evidence.

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The framework helps interpret questions such as:

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• What evidence supports or contradicts raw feeding claims?
• How are microbiological hazards evaluated?
• What standards determine nutritional adequacy?
• How do veterinarians compare fresh, raw, and commercial diets?

 

 

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Professional veterinary nutrition resource • Free download

Key Takeaways

 

  • Pathogen detection in raw pet foods reflects exposure risk rather than confirmed clinical disease.

  • The evidence base relies primarily on observational and laboratory-derived methodologies.

  • Owner-reported surveys describe perceptions and practices, not biological outcomes.

  • Nutritional and hygiene quality across raw diets demonstrates substantial variability.

Scope & Limitations Notice

 

This page synthesizes peer-reviewed evidence available at the time of publication. Findings reflect limitations inherent to study design, including observational bias, reliance on self-reported data, and absence of controlled feeding trials. Associations described in the cited literature do not establish causation. Individual feeding decisions, clinical advisability, and regulatory interpretation fall outside the scope.

References

  • Ahmed, F., Cappai, M., Morrone, S., Cavallo, L., Berlinguer, F., Dessì, G., Tamponi, C., Scala, A., & Varcasia, A. (2021). Raw meat based diet (RMBD) for household pets as potential door opener to parasitic load of domestic and urban environment. One Health, 13. https://doi.org/10.1016/j.onehlt.2021.100327

  • Anturaniemi, J., Barrouin-Melo, S., Zaldívar-López, S., Sinkko, H., & Hielm-Björkman, A. (2019). Owners’ perception of acquiring infections through raw pet food. Veterinary Record, 185, 658. https://doi.org/10.1136/vr.105122

  • Baede, V., Broens, E., Spaninks, M., Timmerman, A., Graveland, H., Wagenaar, J., Duim, B., & Hordijk, J. (2017). Raw pet food as a risk factor for shedding of extended-spectrum beta-lactamase-producing Enterobacteriaceae in household cats. PLoS ONE, 12. https://doi.org/10.1371/journal.pone.0187239

  • Begić, B., Barać, K., Sablić, M., Ostojić, D., Krvrgić, K., & Džafić, N. (2025). Prevalence of Salmonella spp., Listeria monocytogenes, Campylobacter spp. and Enterobacteriaceae in raw pet food. Veterinarska stanica. https://doi.org/10.46419/vs.56.6.13

  • Bulochova, V., & Evans, E. (2021a). Raw meat-based pet feeding and food safety. Journal of Food Protection. https://doi.org/10.4315/jfp-21-158

  • Bulochova, V., & Evans, E. (2021b). Exploring food safety perceptions and self-reported practices of pet owners. Journal of Food Protection. https://doi.org/10.4315/jfp-20-338

  • Davies, R., Lawes, J., & Wales, A. (2019). Raw diets for dogs and cats: a review, with particular reference to microbiological hazards. Journal of Small Animal Practice, 60, 329–339. https://doi.org/10.1111/jsap.13000

  • Dhakal, J., Bhat, S., James, J., Otwey, R., Chapagain, S., & Singh, P. (2025). Highly pathogenic avian influenza H5N1 in raw pet foods and milk. Journal of Food Protection. https://doi.org/10.1016/j.jfp.2025.100628

  • Dodd, S., Cave, N., Abood, S., Shoveller, A., Adolphe, J., & Verbrugghe, A. (2020). An observational study of pet feeding practices. Veterinary Record, 186, 643. https://doi.org/10.1136/vr.105828

  • Empert-Gallegos, A., Hill, S., & Yam, P. (2020). Insights into dog owner perspectives on risks, benefits, and nutritional value of raw diets. PeerJ, 8. https://doi.org/10.7717/peerj.10383

  • Fredriksson-Ahomaa, M., Heikkilä, T., Pernu, N., Kovanen, S., Hielm-Björkman, A., & Kivistö, R. (2017). Raw meat-based diets in dogs and cats. Veterinary Sciences, 4. https://doi.org/10.3390/vetsci4030033

  • Freeman, L., Chandler, M., Hamper, B., & Weeth, L. (2013). Current knowledge about the risks and benefits of raw meat-based diets. Journal of the American Veterinary Medical Association, 243(11), 1549–1558. https://doi.org/10.2460/javma.243.11.1549

  • GÅ‚ówny, D., SowiÅ„ska, N., CieÅ›lak, A., Gogulski, M., Konieczny, K., & Szumacher-Strabel, M. (2024). Raw diets for dogs and cats: potential health benefits and threats. Polish Journal of Veterinary Sciences, 27(1), 151–159. https://doi.org/10.24425/pjvs.2024.149344

  • Nüesch-Inderbinen, M., Treier, A., Zurfluh, K., & Stephan, R. (2019). Raw meat-based diets for companion animals. Royal Society Open Science, 6. https://doi.org/10.1098/rsos.191170

  • Ovca, A., Bulochova, V., Pirnat, T., & Evans, E. (2024). Risk perception and food safety practices among Slovenian pet owners. Journal of Consumer Protection and Food Safety, 19, 293–302. https://doi.org/10.1007/s00003-024-01505-9

  • Schlesinger, D., & Joffe, D. (2011). Raw food diets in companion animals: a critical review. Canadian Veterinary Journal, 52(1), 50–54. https://pmc.ncbi.nlm.nih.gov/articles/PMC3003575/

  • Tuska-Szalay, B., Papdeák, V., Vizi, Z., Takács, N., & Hornok, S. (2024). Parasitological and molecular investigation of consequences of raw meat feeding (BARF). Parasitology Research, 123. https://doi.org/10.1007/s00436-024-08124-1

  • Vecchiato, C., Schwaiger, K., Biagi, G., & Dobenecker, B. (2022). From nutritional adequacy to hygiene quality. Animals, 12. https://doi.org/10.3390/ani12182395

  • Viegas, F., Ramos, C., Xavier, R., Lopes, E., Júnior, C., Bagno, R., Diniz, A., Lobato, F., & Silva, R. (2020). Fecal shedding of bacterial pathogens in dogs fed raw diets. PLoS ONE, 15. https://doi.org/10.1371/journal.pone.0231275

Want to Understand How Veterinarians Evaluate Dog Diets?

 

VetFarmacy created a clinical reference guide explaining the evidence-based framework veterinarians use to assess pet diets.

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Inside the PDF you will learn:

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• how veterinary professionals interpret nutrition research
• how diet safety and adequacy are evaluated
• how microbiological risks are assessed
• how marketing claims are separated from scientific evidence
• how raw, fresh, and commercial diets are compared

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By Dr. Athena Gaffud, DVM
Founder of VetFarmacy | Evidence-Based Veterinary Nutrition

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Free educational resource • No spam

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