Prayers being sent to you. Ive never had that happen due to a neck lifting but My bigger horse went in to convulsions a few years back after we went riding. I went to take the saddle off and the second I released pressure the convulsions started. I called my vet and she was clueless.....it actually took the equine chiropractor comming out to tell me and show me where ...but it was a pinched nerve that caused hers. Shes been fine though ever since. I hope eagle feels better by morning