I rescued a senior GSD, Kelly, four years ago and was told she was 9 years old at that time. Ever since I've had her she has shown weakness in her hindquarters and she drags her back legs. These are classic symptoms of DM, but my vet has her on 100 mg of Galiprant daily, which is a drug for osteoarthritis. We recently went on a vacation with Kelly and forgot her meds at home. She did not show any signs that the week without them caused her any discomfort. I'm wondering whether I'm wasting my money and giving my dog drugs she doesn't really need if her problem is actually DM or something that mimics DM. In your experience, has anyone had a GSD with DM that spanned 4 years or more? Everything I've read said that once symptoms are present, there is rapid progression over a year or so. Kelly still loves the dog park, and although she is not as active as she was four years ago the slowdown is what I would expect from normal aging. The foot dragging and back end weakness are somewhat worse, now but not dramatically so.