Usually kits do this to one another, but sometimes adults will do it to if they hadn't had enough time to nurse from their moms. If the ferret is young, it may grow out of it, but if the recipient's ear is getting red and sore you need to do something. Continude ear sucking on the recipient can cause cosmetic damage as well as infection. Try swabbing some Bitter Apple or better yet Fooey on the recipients ears. This should stop the ear sucking but if it doesn't, personally IMO, I would seperate them. [Posted in FML 6345]