Im at a loss. I have a sweet 8yr old gelding. He will give children rides and he loves to be doted on. hes great on lunge verbal cues, hes great riding with other horses, he fine when someone is in the middle of the ring, BUT when noone or other horses are around, he will walk or gallop only! No trot. His saddle has been fitted, chiros have been out, vet says hes great, shoes done, but he will not ride alone. Only a walk or gallop. When hes outside he will spin without warning. I truly believe it behavorial of a unconfident horse, but im at a loss. Ive had trainers, six month of solid ground work, balance is great. Just dont know what else to do. Any ideas?