A comprehensive UK food safety investigation has revealed that raw dog and cat food products carry significant bacterial contamination risks, with 35% of tested samples containing disease-causing pathogens. The Food Standards Agency (FSA) examined 380 raw pet food products between March 2023 and February 2024, testing for bacteria including Salmonella, Campylobacter, and antibiotic-resistant strains. The findings raise important questions about the safety of raw feeding diets, which have grown increasingly popular among pet owners who believe they mimic what animals would eat in the wild.

What Did the Raw Pet Food Safety Study Actually Find?

The FSA tested 277 raw dog food samples and 103 raw cat food samples from 50 different brands purchased online and in retail stores across England, Wales, and Northern Ireland. Researchers screened each product for several disease-causing bacteria known to sicken both animals and humans. The results were sobering: approximately 35% of all raw pet food samples contained at least one type of pathogenic bacteria.

Even more concerning, nearly 29% of the tested products failed to meet current UK food safety regulations, either because Salmonella was detected or because E. coli levels exceeded legal limits. The study also identified antibiotic-resistant bacteria in about 20% of raw pet food samples, including strains resistant to "last resort" antibiotics used in human medicine. Specifically, colistin-resistant E. coli, a particularly troubling antibiotic-resistant strain, was found in 1% of samples.

Methicillin-resistant Staphylococcus aureus (MRSA), a dangerous antibiotic-resistant bacteria that can spread between species and is extremely difficult to treat, was detected in just under 10% of samples. While this percentage might seem small, the presence of MRSA in raw pet food is considered highly problematic by veterinary and public health experts.

Why Should Pet Owners Care About Bacteria in Raw Dog Food?

The biggest concern highlighted by the study is not necessarily whether pets will become ill, but rather how bacteria can enter the human household. Dogs and cats often tolerate bacteria that would make humans sick, but healthy pets can still carry pathogens in their digestive tract and shed them in feces, potentially exposing family members. Raw pet food introduces bacteria into homes through several pathways:

• Food Handling: Bacteria can transfer to human hands and kitchen surfaces when preparing raw pet food
• Cross-Contamination: Contaminated food bowls and utensils can spread pathogens to surfaces or human food
• Pet Shedding: Pets eating contaminated food can shed bacteria in their feces, exposing household members
• Packaging Leaks: About 8% of raw pet food products leaked during thawing, increasing the risk of bacteria spreading to kitchen surfaces

Certain groups face heightened risk from these exposures. Young children, pregnant women, elderly individuals, and anyone with a weakened immune system are particularly vulnerable to infections from bacteria commonly found in raw pet food. For most healthy adults, infections are usually mild, but the potential for serious illness exists.

A troubling finding was that 41% of raw pet food samples contained no instructions to wash hands and clean utensils or surfaces after handling. This gap in consumer guidance suggests that pet owners feeding raw diets may not fully understand the hygiene precautions necessary to protect their families.

How to Safely Handle Raw Pet Food If You Choose to Feed It

If you decide to feed your pet a raw diet despite the risks identified in this study, proper handling is essential to minimize bacterial exposure to your household. The FSA study underscores the importance of strict hygiene practices that many raw pet food products currently fail to communicate to consumers.

• Hand Washing: Always wash your hands thoroughly with soap and warm water immediately after handling raw pet food, before touching other foods or surfaces
• Surface Sanitation: Clean and disinfect all surfaces, cutting boards, and utensils that contact raw pet food with hot soapy water or a bleach solution
• Separate Preparation: Use dedicated cutting boards and utensils for raw pet food that are never used for human food preparation
• Thawing Care: Thaw frozen raw pet food in the refrigerator or a sealed container to prevent leakage onto other foods, and clean any spills immediately
• Bowl Hygiene: Wash pet food bowls with hot soapy water after each feeding, and do not allow children to handle these bowls
• Veterinary Consultation: Discuss raw feeding with your veterinarian to ensure any diet is nutritionally balanced and appropriate for your pet's life stage

What Do Veterinary Professionals Say About Raw Pet Food?

Raw feeding remains controversial among veterinary nutrition experts. While some pet owners report benefits such as improved coat condition, cleaner teeth, and better-quality stools, scientific evidence supporting these health claims remains limited. Most veterinarians do not recommend raw feeding diets due to the documented risks to both animal and human health.

The FSA study adds to a growing body of research demonstrating that raw pet food frequently contains bacteria, including antibiotic-resistant strains. Importantly, the level of contamination found in raw pet food appears to be higher than that typically found in meat intended for human consumption in the UK, though direct comparisons should be interpreted cautiously because the products are different.

The contamination rates and presence of antibiotic-resistant bacteria in raw pet food highlight a critical intersection between animal health, human health, and antimicrobial resistance, a major global public health concern. The study demonstrates that feeding raw diets can introduce bacteria into the home in ways that affect not just pets, but entire households, particularly those with vulnerable individuals.

Raw pet food will undoubtedly remain popular among some pet owners, but this comprehensive FSA investigation provides a stark reminder that it carries real microbiological risks. The results emphasize the importance of fully understanding these risks and practicing strict hygiene when handling raw pet food. Before choosing a raw diet for your pet, discuss your options with your veterinarian to ensure you are making an informed decision that protects both your pet and your family's health.