They do make ferret-sized e-collars. If you are going to a vet who specializes in small animals, they certainly should have them in stock. If not, ask them to order some. I never knew they made them so small until one of mine was sent home from surgery with one on. You can also make one from x-ray film or any similar, bendable plastic. Just make sure to smooth the edges or put tape over them, so it doesn't rub. Katharine Florida [Posted in FML 6636]