I had a thread a while back about my horse that tossed his head randomly...well I talked to my vet when she was here last and she said that he had a lot of pain in his back and some in his neck that could be the cause. She also does chiro work so she came out and worked on him and my sister's horse and she is going to come back sometime soon for another session. Okay so yesterday I lunged him and hopped on him bareback and he was totally fine during this but late when I came out my sister told me that he had been tossing his head constantly. I watched him a while in the pasture and he was just standing there tossing his head up and down. He also did it some while he was eating his hay later but he isn't doing it today. The vet is coming again tomorrow to do shots and she's going to look at him again. Until then, do you think this is a pain thing or could it be a sign of a neurological problem?