Hi Mary Im Sue and I run the Arkansas Ferret Shelter for the hospice and Sp Needs ferrets, I have 4 deaf ferrets 2 of them are under a year and thay all chew on ther bowls why i dont know but my vet told me about a couple crock bowls to try on them and it dont work they still chew away, so what i been doing even though im against it is the bitter apple spray, take it and spray the bowl arounded the edges let it dry on the bowls dont wipe it off. then poor your food and water in them and the ferrets dont even tast it inless they start chewing on the bowl,, they hardly ever do it anymore but thats befor i forget to spray the bowl after i wash it lol.. hun you might try that, also there is a deaf ferret group in yahoo group just google up deaf ferret group and it should pop up,, and wolfy that posts somtimes she used to have deaf ferrets and shes the one that started the group and i just love it i have learned many thing, Good Luck and Hugs from all the fuzzys and me.. Susan [Posted in FML 6521]