I have a retired 19 year old Thoroughbred gelding who has dropped weight fairly rapidly throughout the last month and a half. He was retired due to a stifle injury in 2022. He retired into a large field, with 3 other older mares. Since 2022, he has been on 24/7 turnout with a round bale, grass in the spring/summer, and he is fed alfalfa flakes 2x a day as well. He gets previcox once a day. We had the vet out in April to float his teeth and she noticed he had a tooth that had broken into fragments and had caused an ulcer on his cheek. She was able to extract part of the tooth but not all of it. The part that was unable to be extracted she floated down so it wasn’t rubbing against the ulcer. I noticed some swelling on his cheek a few weeks after this happened, the vet came back out again and the ulcer had healed over well and the remaining tooth fragment had fallen out (she predicted it would). We put him on a week of antibiotics to see if that would help the swelling go down. It did not, the swelling is still there. I called the vet and she seems unconcerned, said I should keep an eye on him and if anything changes let her know. He seems to be eating normally, seems happy, he is just dropping the weight. We have had a colder and wetter than normal spring where I am so have been blanketing him in a rain sheet to try and keep him from shivering the weight off. I have a call into my vet for an appointment to get some bloodwork done, in the meantime any ideas? I am wondering about PPID?
As some sides note this horse has thin soles in his front feet, so I have kept front shoes on him. He has some mud fever on a hind leg that we are currently treating. He is also grey and has quite a few external melanoma under his dock and in his girth area.