Originally Posted by VanG

... One time, I never forget the cat with declaw came in with heavy heartworm. We were puzzled because the cat is indoor cat. We learned that the owner lived in country and the cat ate a lot of mouse that carried a lot of parasite in it. So we gave pretty a lot of shot that kill heartworm. Today, I know that cat is still alive and hunting around in the house to pick mice. Yike!