Mystery Soreness..!! looking for thought (productive ideas only please)
I have a 11 year old (12 in April) 17.1hh dark bay ottb gelding. He raced in large races, mostly at Churchill Downs. He raced 43 starts with a total winnings of just under $16,000 up through the race at the age of 9. Since then, he has been a lesson horse until I purchased him in August. Due to poor nutrition with his previous care taker, I "started him over" and got him on a complete grain, built his muscle back, and started him into eventing. Now he is all personality and a lot of strength. He is the type of horse that is silly and goofy but wants to please me with all is heart.
In August, we had his hocks injected to help with the arthritis that he unfortunately developed when racing (that was the only injury he got from racing). With the arthritis, sometimes he suffers from shivers in his back right leg, but only when he is standing still for a while. Up until the end of January, he was very happy with my new saddle that fit his "shark fin withers" much better, maintenance Cosequin, hock injections, and great grain.
However, suddenly at the end of January, his shivers became much worse, his body very sore, and was lame. This was not due to over work because for the past two weeks before this, we were doing very light work due to my heavy work load at college. The vet prescribed him muscle relaxers and bute as well as Pentasin (which is an injection into the muscle for the joints, similar to Adequin) and he began to improve. Although his muscle soreness only reached about 50% improvement. On the 5th shot on Pentasin the week before last, he had a big local reaction to the medicine, however has fully recovered. Now, he is on the low dose of muscle relaxers and a moderate dose of bute, and although he is acting much better he is still very body sore...
Blood work came back negative with only a low level in total proteins. (which we are getting a multivitamin to help). Detailed blood work came back negative for any diseases (ex: lyme disease).
The vet wants to run a muscle biopsy however I am thinking that he is tight and in pain do to something internal rather than simple muscular because with all the medication, he is still sore to the touch. I know that ulcers are claimed a lot more than they should, however I am thinking that he is so uncomfortable with how the medicine is hurting his gut that he is clenching and making himself sore by trying to get comfortable.
What do y'all think?? I am really upset without being able to ride my sweet boy ):