He seems perfectly healthy, otherwise. Gromit is eating well, and drinking plenty of water. I brush him a lot, so he doesn't have hairballs. He is somewhere around 9 or 10 years old. The coughing isn't constant...it comes in little spells, 2 or 3 times a day. Gromit is strictly an indoors cat. He never goes outside and I have never had a problem with him eating non-food items. I am taking him to the vet tomorrow, but was wondering if anyone else has had this problem.