we just brought home out first bulldog puppy. he is 11 weeks old and the breeder is feeding him purina pro plan chicken - 1 cup 3 times per day. he doesn't seem to be having any allergy problems that I can tell, and his poops look normal! should I still think about switching him to a better food? something like fromm? or should I not change it if he seems to be fine on it at this point?