Decomposition is a bacterial issue. The toxins that are produced are produced by bacteria.
I’ve been combining raw and kibble for years on multiple dogs and never had an issue in any way. My dog with gut issues definitely digests kibble better along with raw. Personally, I think the admonition to not mix the two is an old wives tail based on anecdotal “evidence.” Raw fed dogs would have gigantic stools too, if people fed like amounts of grains, veggies, etc. My dogs have very small stools since they aren’t fed the foods that have tons of fiber and other filler ingredients. Well, except for my JRT, who actually gets fiber added to her food, but that’s another story.
