I am not Reading all that Peer study , but what concerning is that a lot of dogs and cats are dying of cancer … why ? They end up old and sick and if the veterinarian can not diagnose the disease , they said it’s cancer and the animal need to put to sleep .
There must be something changed “ the way we feed the animal as it’s against their nature habit “
The nature of animal like Cat and Dogs , they are Carnivora which is eat meat .
Have you try to feed your dog , raw meat 🥩 in small chunks everyday for a week ? Don’t give them dog food from store . And see how your dog energy and stamina in a week ?