My fiance's horse Trojan has an interesting little quirk. He is an 8 year old Standardbred gelding.
All of my horses are fed from feed buckets on the ground. Trojan seems to have balancing issues with eating from his bucket. The muscles in his front legs all quiver & sometimes it appears that they give out from under him. I noticed it, first, last summer while feeding, but it was basically just the occasional quiver. It appears to have become much worse since then.
He grazes without a problem. It really only happens when he is eating from his feed bucket.
I took a couple of videos this evening to post to see whether anybody here might have some idea as to what is causing this. If there is any other information that I have left out, please ask, as I really am starting to worry.