Anyway.. He used to be very difficult when I tried to pick up his back feet, and I just taught myself a way so I don't leg go of his foot during his spasm and it gets better and it is fine to pick out. Recently.. I was picking my horse's foot on the wash-rack when he suddenly seemed to lose his balance bringing it down and just slid down to the ground with his front legs underneath him. After about a minute of him trying and me pulling him up, he was fine, got worked and had his normal routine. Then just the other day I was bringing my horse out of his stall tacked up when he had a spasm and fell down halfway in and out of his stall. His front legs were in front of him though this time, and it seemed easier for him to get his balance back and after me pulling him slightly he got right back up. He was a little nervous at first but then calmed down back to himself. Recently, his spasms have been a little more frequent and worse! Some websites say that falling down is in severe cases, but I'm not sure what I can do? He's 18 yrs old and is still jumping 3ft and can show competitively. He acts like he's 8 instead of 18 and positively loves his work. I'm not sure if he needs consistent work like he has, or to lay off it like some websites say.... Anyone with knowledge of shivers please help me!