I've noticed my horse has been trembling for the past few days, I didn't think it was anything, but today I noticed it is now all over his body. He came back Dec 1st from a training center in Ohio, and he was on quarantine until the 20th. He's been with my mare in the pasture since then, and about 4-5 days ago I noticed that his front left leg was shaking as if he has a shoulder injury. But now it's his whole body, it's very subtle sometimes, and extreme other times. So obviously it worries me, I will check on him tonight again, and I will call my vet in the morning. Yes , I know shame on me for not thinking trembling was bad sooner, but right now I'm stuck. Do any of you have any suggestions for what could be the cause of this?
I've never seen anything like this.