On the chain issue...

VERY dangerous. A chain is nothing like a bit and any bit that's harsher than a chain has no business on a horse.

If you have ever seen the face of a horse who got away from someone with a chain over it's nose or in it's mouth you will not repeat that behavior again. If they step on that lunge or get away they can reduce their face or mouth to chopmeat in seconds. It's really not a good idea.

Then again... losing one's temper rarely solves anything other than making one feel momentarily better. I'm older than the bunch of ya *LOL* and I had my share of pissy PMS I'll show that horse who's boss days in my younger years. I regret them all. They never did a thing to foward the transformation of a horse's behavior.

No matter what the horse does punishment should be swift and just, not prolonged and out of proportion to the infraction.