I have two ferrets, female about 2 1/2 years old (according to previous owner.) One, Dukey has started biting on the edge of the litter pan and plastic waste baskets. Otherwise she seems well. She is active; eating and drinking well. Could this be a symptom of something more? I had one in the past that was having pain with similar symptoms. Any help is appreciated. Olivia [Posted in FML 7759]