Dr. Karri McCreary, co-owner of the Greenville Animal Hospital, says she is seeing a major increase in distemper in dogs. Dr. McCreary estimates the number of distemper cases has perhaps doubled in the past couple of years. She said distemper was almost considered a thing of the past when she was in vet school, but it has returned in this area because too many people do not vaccinate their pets. Dr. McCreary says the disease is almost always fatal.