A head bob at a trot means the horse is lame and that something is wrong. The symptoms you are saying sounds very much like Navicular.
.Did you do xrays ? Where the shoe is removed, the hoof packed with clay and xrays taken to show any shift or change in the bone?Did she use hoof testers and really put pressure on them?Did she do nerve blocking? I bet this "lameness" the horse was put to pasture for is Navicular and they might have thought it would go away. T
I have seen horses show nothing during a flex test , but when the testers are applied, they show pain. Or the xrays show the change in the bone.
Your vet is not doing a complete job at checking this horse, whether you trust her with your life or not. Any vet that passes a head bobbling horse as sound without discovering WHY the horse is showing lameness signs at a trot is not doing you any favors.
Last edited by wyominggrandma; 05-06-2013 at 10:24 AM.