So I had a horse brought to my house recently by a friend as a trail horse for my wife. Supposedly it was supposed to be the best trail horse that I would ever own (so he says) anywho I noticed it was making this head motion when he unloaded it and put it in my stall. He immediatly asked me if I had any feed in the stall. I replied with NO. There was nothing in the stall at all. It has been 4 days and the horse is still doing it. Also I tried to ride it friday and the horse was acting crazy he was throwing his head wildly and I called the guy back and he said it was very uncharactistic of the animal and that it had always been a very level headed horse as long as he had it the past 2 years. The guy is going to make the deal ok I have no fear in that but I am concerned why the horse is doing this. Is it possibly something loged in his throat or what could it be?? Check out the video I will link here. In the video you will see he is doing this over and over.