I've been having an issue with my horse over the last few months. Its started a few months ago when after tacked up he flipped out and fell back, He then stood up and acted like nothing was wrong. I checked the saddle and the girth and everything seemed fine. This happend a few times in the past many years ago but I guess I thought something spooked him. The problem now is everytime I try to saddle him he gets nervous and seems like he he ready to going into flight mode. I had the vet check him along with the saddle fitter and everything seems fine. Could he be cold backed? After reading some articles he seems to be showing signs. I have owned him for 5 years and before this He only did it a few times years ago. He looks great and put some weight on. Maybe its just a reaction of him thinking that it might hurt. Iam having a trainer come out next week to take look at him. This is really upsetting because he has been so good to me and so many people tell me how lucky I got with him. Any comments?