What the…??? Stifle!!! How is he doing now he’s back with you with proper treatment? Any idea where/when/how the injury occurred, or is no one willing to 'fess up? Timeline sounds suspiciously like the rehab place. Was he just on handwalks, or turned out at all?
Photos, photos, photos: would be good to document condition if anyone else has a situation like this, needing to send a horse out for short or long term rehab.
Pergolide/Prascend is known to decrease appetite. We have a large WB at the barn who started out on one tablet daily, and he quit eating any hard feed, picked at hay. Tried all sorts of temptations, meh. Refused to take treats, was suspicious of ‘contamination’ by Prascend stuffed into one, so refused any at all! ((Had a buffet of different treats, candy, cookies, etc. to dose him. Resorted to a small 6cc syringe and dissolving the dose in warm water, then squirting into his cheek. He doesn’t like it, but he gets his dose without too much wrangling. At least, until he learns to spit it out after holding it in his cheek!))
Cut dose in half and got him eating again. Each time vets tried to up the dose he would only pick at his hard feed, in spite of many temptation tactics. It is a balancing act, and every few weeks he may decide he wants a different hard feed, or combo. ((Stocking three types of senior at the moment, plus alf pellets, beet pulp, fat supplement, oats, toppings, etc. Feed room is a veritable buffet for the two picky eaters in residence. Good thing the hay is so fabulous.)) Big Guy will now take peppermints from me if I unwrap one in front of him, the smart dude!
Soooo, may want to check with your usual vet/uní vet/specialty vet/ pull blood to see if the pergolide is essential right now. Especially if nutrition for healing trumps Cushings–?
How is the Old Man doing? Prognosis on the stifle? Will he be pasture sound, and do you have space to rehab or stall rest him at home with you? Is he of the temperament to handle stifle rehab and anything needed for sinus flares? Is he still getting abx for sinus crud, or flushing? Any light at the end of the tunnel, or just go with the flow now?
JINGLES!!!