Here's to a speedy recovery! I'd like to add one more thing. Years ago, my vet recommended doing annual bloodwork once they hit that "senior" status (7 yrs). Recently a friend's 11 yo became lethargic, just off... I asked him when the last time was he had bloodwork and he'd never had any done. He goes to the same clinic as I do but has been seeing a different vet and they never mentioned it when they've done shots etc. He had bloodwork the next day and his liver enzymes are extremely high. They thought inflammation, gave antibiotics and a supplement, and when he went back for follow up bloodwork (which no one mentioned but me again..), they were even higher. He saw my vet who recommended an ultrasound, and it was ugly. Now there is nothing that can be done. So do that preventative screening and know what your baselines are. I think the blood panel w/ T4 runs ~$150 total w/ the draw.