Not that I was too worried, but a cat that hasn't been sick in his life doesn't come down with a immunodeficiency disease out of the blue for no reason. He actually gained a little bit of weight this week (must be the baby food), he road better in the car (4th trip to the vets this month), and his gums have died back from a flaming red to a bright pink. A lot of progress in a short time.
At this point we are assuming that this was triggered by the stress of moving. Before we moved, my husband and I talked about the possibility that the move would cause some stress related illness in one of the cats, and the one most likely would be Stumpy. He's king of the house, and poor guy takes on a lot of burdens being the king. He had to make sure that everyone had their place (with him on top) in a new environment. I wish I could take that job from him, but that's just not the way with cats!!
He's going to be on pred daily until the swelling is entirely gone, then every other day for probably the rest of his life to contain flare ups. Antibiotics for probably another 3-4 weeks, and will get an excessive dose of love and affection from Steve and I.
And the vet recommended they start on a good tarter control food. I bought a bag of Science Diet T/D, put a little bit on top of their regular food and filled a second bowel, and it disappeared almost immediately. I'm not sure that Stumpy got any of it, but it sure is a big hit in the house. Hope it isn't THAT expensive!