So one of the foals at work is a GORGEOUS 6 month old colt, who is already well aware that he's a boy. He will bite, rear, kick, and run you over when he feels like it, and will try and act studly around certain mares. My question is how to train him to behave better now, so that I'll be able to have a good handle on him when he's older and bigger. My boss didn't geld the last two colts until they were over 2 yrs old so I know that I'm going to have to deal with him like this for a long time and I want to nip it in the bud while he's small!
He is extremely smart and will be easy to train (judging on how easy it was to teach him to square up, lead, stand for the farrier, etc) but I just need to know the techniques in order to implement them
So I know he's a stud, but don't ACT like he is.
EDIT: Just read the last part of your post over. He knows how to square up and stand for the farrier but he bites and runs you over? Yeah he needs extra work on respect before anything else.
I always take studs into consideration, they can be intimidating and hard to train sometimes. But honestly, gelded or not, I expect them to behave as a gelding. DO NOT write off any of his behavior as "oh he's a stud" (not that you would, just saying).
What would you do with a filly? Do that with a stud colt. There should really be no fundamental difference in training, except for maybe being especially picky with a colt's behavior, I'm hard on them.
Biting, kicking, rearing, running you over, he has no respect. There are a ton of ways to earn that respect. Especially with studs, you're right, its nothing to mess around with. By the time he's 2, he'll be a handful and a half if it's not corrected right now.
Basics: Don't let him bite, kick, rear, or run you over without a serious consequence. Whether it be a swift "kick in the butt", or a send off, or circle, something to highly discourage the behavior. I would start there. Then teach him all his basics: leading, tying, bathing, clipping, standing for farrier, haltering, basic lunging, picking up feet, having his ears touched, sack him out, etc.
Above all, whatever you teach him, make sure he learns all of it respectfully. And work on the biting and other bad behavior FIRST.