I doubt that unchewed kibble is the problem. More than likely, it is a food sensitivity of some sort. If I had to guess, it is the kibble. Kibble is highly processed at a high heat, which renders the fats somewhat indigestible. Could be, your puppy is one of the dogs who has a sensitive stomach. My dog has a sensitive stomach. Any reason you want to feed kibble? Canned is better. (that is just my opinion and the opinion of some nutritionists, but not all). However, canned can be higher in fat.
It is perfectly OK to crush the kibble, by the way. Many dogs never actually chew kibble. I had a pug that never chewed kibble. . .just woofed it down whole. He was fine. When you switch brands, do it over a week. 1/4 at a time. . .very slowly.
