Walk through any pet expo in Bangkok and you can see it: raw feeding is no longer a fringe idea. The meat is fresh, the sourcing stories are convincing, and the cats look magnificent. One fact sits quietly underneath all of it. Salmonella does not change the colour of meat. Listeria has no smell. The two pathogens that matter most in raw food are invisible at the point of purchase, and careful sourcing cannot make a product verifiably free of them.
What testing actually finds
The largest public dataset comes from the US Food and Drug Administration. The agency bought 196 commercial raw pet foods, shipped them frozen to six laboratories, and cultured them. Fifteen samples carried Salmonella and 32 carried Listeria monocytogenes. That is 38 contaminated products out of 196, close to one in five, all from ordinary commercial brands. The same programme found almost nothing in dry and canned foods.
A 2024 peer-reviewed review gathered every published survey it could find and reported Salmonella prevalence in raw pet foods ranging from 0 to 80 percent depending on the study. The spread is the message. Contamination is random, batch by batch, and every untreated batch takes the same chance.
Freezing is a pause button, not a kill switch
Raw cat food is sold frozen, and the cold feels like safety. It is not. At freezer temperatures bacteria stop multiplying because the water they need is locked away as ice. They do not die. They wait. Thaw the food and the survivors continue exactly where they stopped. Food safety agencies treat freezing as preservation, never as a kill step, and the FDA's raw pet food guidance is built on that fact. A bacterium that entered the pack at the factory is still in the bowl at dinner.
Cats cope better than humans. That is not the same as safe
A healthy adult cat runs a highly acidic stomach and often carries Salmonella with no symptoms at all. The problem is where the bacteria go next. Infected cats shed pathogens in saliva and faeces for weeks, which turns the litter tray, the food bowl and the cat itself into transfer points. The FDA's concern with raw diets is explicitly double sided: risk to the pet, and risk to the people handling the product. Veterinary nutrition researchers at Tufts documented a child infected through the family dog's raw food. Kittens, senior cats, pregnant queens and any immunocompromised person in the household carry the real exposure.
The fix is called a kill step
Human food solved this problem a century ago. Milk is pasteurised. Canned food is heat sterilised. Premium juice is pressure treated. Each one is a kill step: a validated process that reduces pathogens by a known, measured amount. The unit is the log reduction. One log means 90 percent of the bacterial population destroyed. Five logs, the common food safety benchmark, means 99.999 percent. A kill step is not a promise about sourcing. It is arithmetic applied to bacteria.
Raw pet food can have a kill step too, without cooking anything. High pressure processing crushes bacterial cells with cold water pressure. An electron beam breaks bacterial DNA inside the sealed frozen pack, in seconds, at doses regulated by the US FDA for exactly this purpose. Most raw brands, in Thailand and worldwide, use neither.
Three questions for any raw brand
The team behind Bangkok Cats, a world championship cattery, has fed raw for years and screens every producer the same way. Ask three questions. What is your kill step? What log reduction has it been validated to deliver? Can I see the laboratory result for my batch, tied to the lot number printed on my pack?
A brand with real answers will send you documents. A brand without them will send you adjectives. Trust is not a process. A kill step is.
