There is a difference between the Cat and Dog food no grain diets. The cat does have Taurine and the dog does not. Which I do believe ferrets probably do need? And the fiber content is about. 05% lower. Less poop, I guess? :) And by no means am I saying its OK to feed regular dog food. I just think that many of the new no grain dog diets are OK to mix in with your cat/ferret foods. Joan Vick (Ferrets since 1977!) Riley, Jenny, Lacy and Elijah and 21 Angels waiting at the Bridge [Posted in FML 5484]