Adjusting to a new diet can alter a dog’s gastric environment quite significantly and it can take time for their bodies to adjust. Dog’s fed on raw diets typically have much more acidic stomachs and guts than those fed highly-processed foods. As such they are much better at digesting a variety of food types including things like bones and getting the maximum nutrition from them. Dogs adapting to very different types of food, dogs with sensitive stomachs or even smaller dogs with shorter gastro-intestinal tracts can take longer to adapt to new diets. If they don’t transition gradually they can even experience diarrhoea or vomiting.