Yes, I have seen this in my rescue. Some ferrets are so strongly bonded to their cage mates, that when the cage mate dies they feel there is no reason to live. We honestly feel that ferrets like other animals including humans can and will die sometimes of a BROKEN HEART. This is why I always recommend to bring a new furkid into the family if you have one that is terminally ill. This way the one that will be left behind will have a friend to console them in their time of remorse and give them the strength to go on living.. Hope this helps you. Debi [Posted in FML issue 5165]