The Antibiotic Resistance Myth Surrounding Raw Pet Food

In recent years, one of the loudest talking points against raw feeding has been this: “Raw diets create antibiotic resistance and endanger human health.” It’s a powerful claim. Antibiotic resistance is real. It’s serious. It affects hospitals, veterinary medicine, agriculture, and public health worldwide.

But when the conversation is framed as “raw food equals antibiotic resistance,” pet parents are not getting the full scientific picture. They’re getting a simplified narrative created by Big Kibble companies, and this marketing simplification leaves out the most important information.

Where Antibiotic Resistance Actually Starts

Antibiotic resistance does not originate in your kitchen, and it does not originate in your dog’s bowl. It originates primarily in the widespread use of antibiotics in human medicine and livestock production¹. When antibiotics are used, bacteria that survive them are selected. Over time, these resistant bacteria multiply and spread.

Many resistance traits are carried on mobile DNA molecules called plasmids. These genetic elements can move between bacteria, accelerating the spread of resistance across animals, people, soil, and water systems². This is what we call a One Health issue; it involves the entire ecosystem, not just pet food.

Does Cooking Meat Into Kibble Eliminate Resistance?

It’s often implied that cooking meat into kibble reduces the risk of antibiotic resistance. That is not scientifically accurate. Cooking and extrusion do significantly reduce live bacterial contamination. That’s true. But antibiotic resistance is not only about live bacteria, but it’s also about antibiotic resistance genes (ARGs). Heat kills bacteria by damaging proteins and cellular structures. It does not destroy DNA. Research shows that resistance genes remain detectable after food processing temperatures and persist as DNA fragments even when bacteria are no longer alive³.

This matters because bacteria in the gut can acquire genetic material from their environment through a process called horizontal gene transfer⁴,⁵. Under certain conditions, resistance genes present in environmental DNA can be incorporated into resident gut microbes. That does not mean every fragment will transfer. But it does mean that “no live bacteria” does not automatically equal “no resistance genes.”

Metagenomic analyses conducted by the U.S. Food and Drug Administration have identified antimicrobial resistance gene signatures in commercial pet foods⁶. Additional research characterizing resistomes in processed animal feeds, including dry pet foods, supports the same conclusion⁷. Thermal processing reduces viable potential pathogens, but it does not guarantee elimination of resistance genes.

The Real Source: The Meat Supply Chain

The deeper issue lies upstream. Antibiotic-resistant bacteria are selected in livestock systems where antibiotics are used. The FDA’s annual summaries of antimicrobial sales for food-producing animals show the scale of medically important antibiotic use in agriculture⁸.

When resistant bacteria develop in food animals, they enter slaughter facilities, rendering plants, and processing environments. Whether the final product is raw, canned, freeze-dried, or extruded kibble, the starting material comes from the same agricultural ecosystem. Most commercial pet foods share the same factory-farmed supply chain reality.

The reality is, research shows that pets can carry resistant bacteria regardless of the type of food they eat. A global meta-analysis of extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli in dogs and cats found widespread carriage influenced by geography and environmental exposure⁹. Resistant strains in pets frequently mirror those found in human households and communities, reinforcing that resistance ecology extends far beyond diet.

A common fear-mongering tactic from kibble conglomerates and industry-paid veterinarians is that raw food contains potentially deadly bacteria.

Big Pet Food Industry Vets: “Raw Food Is Dangerous”

Wild game absolutely can carry higher levels of potential pathogens. But in the U.S, commercially prepared raw diets are regulated under the Food Safety Modernization Act (FSMA), which requires hazard analysis, preventive controls, and pathogen monitoring¹⁰. It’s a zero-tolerance for potentially pathogenic bacteria.

Many raw pet food companies use High Pressure Processing (HPP), a non-thermal pasteurization method that subjects sealed food to extremely high pressure¹¹. This inactivates pathogens like Salmonella and Listeria without heat damage to proteins or nutrients. HPP’d commercial raw diets can test negative for all bacteria (including the good guys) after processing; this fact should silence the kibble-pushing industry vets, especially when choosing foods for immunocompromised animals; the mycotoxins and bacterial contaminants repeatedly found in ultra-processed pet foods become the real concern for debilitated animals.

The highest risk category is homemade raw diets that are not nutritionally balanced or carefully handled¹². That’s why many 2.0 pet parents feeding pets with health conditions choose to gently cook (poach) homemade meals. Lightly cooking nutritionally complete, homemade meals is completely acceptable, and cooking fresh, real ingredients once, at home, is very different from the four repeated high-heat processing steps used to make kibble: rendering, creating dry food powders, extrusion under high heat and pressure, drying.

The Elephant in the Room: Advanced Glycation End Products (AGEs)

Those repeated high-heat processing steps required to make ultra-processed pet foods create advanced glycation end products, or AGEs. These compounds form when proteins and fats react with sugars at high temperatures. The more heat processes, the more AGEs in the pet food you’re feeding to your beloveds.

AGEs increase oxidative stress and inflammation. They have been shown to adversely affect nearly every tissue system studied, including the kidneys, heart, skin, blood vessels, brain, pancreas, connective tissue, and more¹³. Thousands of research papers link dietary AGEs to chronic disease processes in humans and animal models¹⁴.

Highly processed pet foods contain dramatically higher levels of AGEs than fresh diets. One study found dry dog foods that were tested contained approximately 122 times more AGEs and cat foods 38 times more than minimally processed alternatives¹⁵.

While major pet food corporations spotlight bacterial fear, they rarely discuss the metabolic consequences of extreme processing. If AGEs promote systemic inflammation and tissue damage across organ systems, why is this not part of the mainstream pet nutrition conversation?

Researchers are actively looking for ways to reduce antibiotic use whenever possible. Probiotics are often suggested as a supportive tool because they can help maintain gut balance, reduce digestive upset, and potentially lower the need for antibiotics. Using carefully screened, species-appropriate strains rooted in a dog’s evolutionary history aligns with the goal of supporting gut health without contributing to the broader problem of antibiotic resistance.

When selected thoughtfully, probiotics become powerful tools for supporting not just digestive health, but overall immune balance, inflammation control, and emotional resilience. By nourishing your dog’s microbiome with intention, you’re supporting health from the inside out, where true wellness begins.

About Karen Shaw Becker, DVM, CVH, CVA, CCRT

Veterinarian Dr. Karen Shaw Becker believes biologically appropriate food and an animal's immediate environment are essential in determining health, vitality, and lifespan. She has spent her career as a wildlife and exotic animal veterinarian and small animal clinician, empowering animal guardians to make intentional lifestyle decisions to enhance the well-being of their animals.