I'll try to make this brief. 4 y/o gelding. I've had him for 2 years, he hadn't been handled much previous to me getting him. He's a very nice horse and very well behaved 90% of the time (undersaddle, on the ground, etc) Recently (August/Sept) he was sent to "boot camp" for 60 days reining training. I also had a horribly fitting saddle that was pinching him really bad, we've got that fixed now, although I'm not sure he knows that yet. I've only ridden him 4 times with the new saddle. When he bites: Mainly around his breakfast grain. If you touch him or get near him he pins his ears and acts aggressive. If you go up to him and touch him sometime's he'll try to bite/nip sometimes not. He seems especially grouchy if I touch his withers (saddle?). He's pretty bad somedays around his hay (eating 24/7 on a roundbale). It's mostly food-oriented, seems like. If he's tied up, or not eating he's pretty chill with everything.. He wasn't like this this summer, it really seems like the cold makes him grouchier... He acts like he's going to kick somtimes too, but he hasn't actually kicked out in over a year. He'll lift his foot and swish his tail. If he's tied up while eating I can handle his feet/legs with very little trouble. I'm really not sure what his problem is.. I smack him with whatever I can (my fist, elbow or throwing a bucket at him) whenver he bites or comes at me.... I don't understand. I've tried to "just pet him when he's trying to bite" thinking that might work and of course it DID NOT. He's just ill around food. He has 24/7 access to a round bale, he never goes hungry. Any ideas would be great... He bit me for the 2nd or 3rd time EVER today. Bit me hard enough it bled a little, and I had on a t-shirt, thick hoody AND a carharrt jacket! I'm 17, fairly knowledgable/skilled with horses but this has me stumped. He's had ALL the groundwork done that I know of, the trainer went over everything with him..