Everyone has their sticky points in their personality, eh?
Hope he's back to eating again... I don't know what to make of that, I know I don't like to eat when I'm hot, it'd do me good to come down and spend a summer with you :~)
There is nothing physically wrong with him, so it's hard to say. His only other symptom is that he refuses to let any other horse be in the paddock next to him except Quest. He threatens and charges everyone else. ????