Update on the Dusty front: The tests are back and the vet doesn't think it's cancer. The bad news is, he doesn't know what Dusty's problem is.
We are keeping our fingers crossed.
Meanwhile, we've been pampering the poor thing (and his sister). We used to feed them mostly dry food with canned food as a treat a couple of times a month. Now it's canned food every night.
Thank you all for your kind words and good wishes.