Overall the vet visit went well. Both dogs are in good health and tested heartworm negative.
Kia, as I suspected, is starting to go deaf. I've already been working with her on hand signals which she's responded well too. The "joys" of old age. She's otherwise in quite good shape for her age.
Chipper had some suspicious looking bites on his head and ear, so Dr. Joyce shaved his head for a better look. She feared tick bites, but seeing as he's showing no symptoms of Lyme Disease, she decided against a blood test. They could be just deerfly bites. He does, however, have an ear infection, which I have medicine for, and he goes back in 10 days.