I used to use Innova Evo cat food before they came out with the ferret food, since then I have switched. I was hesitant at first to switch since I didn't want to spend more money if it wasn't that much different. The order of carbohydrates and fiber each one has is the dog being the highest, cat the medium, and the ferret being the lowest. There was enough of a difference to make me want to switch. After all the closest to a natural ferret diet is the least carbohydrates, especially fast acting sugars. The dog version I feel has too many carbohydrates for ferrets. Now if people are having a problem with their ferrets having diarrhea after a month, you could switch to the cat version which has a little more fiber. Remember, whenever you switch diets though you will usually have diarrhea for a week or so with it slowly getting firmer. Since using this food, the one huge thing I have noticed is that even my older ferrets act almost like kits, and definitely have better muscle tone and fur. I hope this helps! [Posted in FML 5480]