Feeding manners is a huge one for me. I've had a few horses that were food aggressive and one was while I was pregnant (he had been starved when I picked him up). He had a habit of striking at anyone who went in his stall once he had grain. Since I have to go back in the stall to fill buckets and hang hay bags, he had to learn that aggression wasn't going to do anything but get him pushed away from his feed. This yearling filly got babied a little due to almost dying from a severe colic episode. She's gotten more than a few good whacks for getting pushy over food. Do NOT be cramming your head in the bucket before I'm done putting the food in. Do NOT be cramming your head in a bucket that I'm carrying elsewhere. Feet manners are important as well as not fighting or starting trouble with other horses while either horse is being handled. I hate nothing more than a horse that'll run by and kick at a horse in leading.