Thought for certain it was SI issue, but...
I am curious what others think about this... My daughter has a 17h 9yo Oldenburg pinto that she plans to show in the hunter / equitation ring someday. We purchased him approximately 2 years ago and 3mos into it, he came up with a hind suspensory tear and sesamoid avulsion. After every possible treatment (shockwave, stemcell, tildren, ligament splitting w/prp, bi monthly US) and VERY Conservative and thoughtful rehab for a year and a half, we received a clear bill of health and a ligament that was like new. He has been in regular work now since June and have been jumping him minimally (trainer was busy with finals and daughter busy with new school). Since rehabbing him, his way of going has always been difficult: Very resistant to move forward, head straight up in the air, bunny hopping in the trot, reluctant to pick up canter, definitely better canter on right lead than left, and sometimes cross cantering on left lead. 2 Issues have come up this fall:
1. Mid October, my daughter came into the barn and her horse was having spasms in his left tricep. Very isolated but that muscle contracted every second like clock work. Our vet quickly adjusted his diet to high fat/no carb and added Vit E
/selenium. After the 2nd day, the contractions stopped. We brought him back slowly to normal work for he was a little sore on that Left front. After exhausting blood tests(EPM, WN, Lymes,etc), only muscle enzymes came back a bit high. After a little research and suspecting his dam's pedigree with QH and pinto, we should know whether for certain he has PSSM tomorrow(sent off mane samples).
2. Mid November, the horse was doing the above (bunny hopping etc.) to the extreme. He also looked a bit off with hip dropping/hiking on one side at trot. I thought for certain we had reinjured that suspensory. Vet came out flexed concerned area, sound. US suspensory, and he said it looked about as good as it could look. A few days later, the chiropractor came out and found that he was "devastated" in his poll and croup. The next day, the horse was fabulous: forward, relaxed, sound etc. After speaking to my vet about the findings, we decided to inject the SI joint. After thorough lameness eval again, last Wednesday, we did the US guided injections of SI with great hope.
Normally, the vet gives 1 week off but she wanted to keep him moving along given his injury and the PSSM concern, 3 days with t/o and then 3 days walking. Yesterday, we worked him like a normal horse/normal hack. He was MUCH worse than usual. Not wanting to canter, not moving forward, trantering at the trot, not keeping the left lead canter and lifting his tail and swishing it a great deal. Today, the same.
This is such a mystery and very frustrating for everyone. Any thoughts about whether this is SI or PSSM? Anyone else experience something like this?