Hi all, This sounds like a individual ferret had a problem. I myself have been using Wilderness (Duck and Chicken versions) in my mix for over 5.5 years with not one problem. I only have one case of insulinoma that the ferret in question was almost four when I got her years ago. The others in my care are 6+ years old now, no insulinoma. Luck? Maybe but higher quality foods with little or no carbs have made all the difference here. Back the the BB. It is quite possible that your ferret had this particular problem ( I have no idea what you have fed previously or whether you introduced the new food all at once alone) but I always transition my guys to new foods because even in dogs and cats, constipation happens in some and diarrhea in others happens. It depends on the animal and their digestive system and what they are used to. Also with any kibble it's important to make sure they have access to clean water everyday. I caution people only using water bottles with their ferrets to make sure their ferrets have a water bowl of some kind available all day. They just don't get enough water from a bottle. That in itself with any kibble can cause problems. Leanne B [Posted in FML 7780]