Theres a mare that i've noticed it she stands a certain her leg will shake... She never limps... never acts lame. Its never warm.... She never acts as if in pain and is great to ride with no problems... But have felt it when she stands still and have seen it when she stands a certain way.... Should I be worried. She has only done it twice after riding... But she has gone on trail rides and long rides without doing but sometimes does it without even riding just standing a certain way... She was a rescue... 16 hand high TB. Its not very offten only seen it maybe 4 or 5 times in 2 months... could it just be the way she is standing? She never acts as though she is going to fall over either... ANd if she moves it quits.... I felt the quivering on her chest one time instead of the leg so maybe its in her chest instead of her leg and just causing her leg to quiver too? She was not ridden for a long time or fed properly so she has no muscle mass to her at all so maybe a muscle spasm... she has no scares or anything to say it was an injury...
Have your vet check her out.
We have an older swedish warmblood at the barn and he has "shivers" (i'm not sure of the formal term, but your vet will know). It's in his back legs, basically he doesn't have that great of control over them, he competes (dressage/eventing/jumpers) but we can't pick out his back hooves (even the farrier has a hard time and can't trim them some weeks) and he has a harder time backing up any more than a few steps.
Does sound like it could be shivers. Here is some info about it -
"Shivers or shivering are names that have been applied to a chronic nervous or neuromuscular syndrome in horses. The syndrome principally affects the draft horse breeds. Shivers has been also reported in Warmbloods and Warmblood crossbreds, and occasionally in lighter breeds of horses, including light harness horses, hunters, hunter-jumpers, hacks, Quarter Horses, and Thoroughbreds. In ponies, shivers is considered uncommon to rare. The condition develops slowly and can occur at any age with reports in horses as young as one to two years of age. Many horses that hold a hind limb flexed and tremble are said to have Shivers. However, many disorders can create irritation in the hind limbs of horses and cause this type of sign. The classic disease called Shivers is a neuromuscular disease in horses that is characterized by trembling of the tail while held erect, trembling of the thigh muscles and a flexed and trembling hind limb. (UNIVERSITY OF MINNESOTA Equine Center)"
No its her front left. And she still stands on it... It just shakes.... So hmmm.. bu she has notdone it sence... I figured it was from not being worked in a long long time and then maybe a muscle spasm or something....
It may be worth a phone call to the vet, not something I'd call one out for though.
I'd keep an eye on it and see what happens, it may just be from her not working and then going back to work, her muscles are tired and in need of conditioning...it happens to me if I do something too strenuous..like chasing the kids in the yard then sitting down in a lawn chair, my weaker right leg will tremble a little. (bad bad sprain and torn ligaments in r ankle many moons ago)