I am no expert but this is how I did it with one of mine. The horse was gentle enough to let me touch her. Every day at feeding I would bring the halter and lead rope out and hang it by the feed bunk. When she got used to that I started using it to rub on her with. All around the neck, face etc. She finally tolerated and even begin to enjoy it. After a few days she let me slip it over her head and back off without buckling it. I repeated this over and over with lots of praise when she stood still. Finally I was able to put it on and off at will. Leading was a different matter. I tied an old inner tube to a tree then tied the lead rope to the other side of the inner tube and then put the halter on. She of course pulled and pulled but got nowhere. After she fought it for awhile she allowed me to undo the lead rope from the tube and she followed me around like a puppy. Then it was just a matter of working on her leading manners etc. The inner tube has enough give to keep them from hurting themselves and they wear themselves out pulling against it. I made sure that every time she got the halter put on it was a good experience. Lots of petting, brushing and horsey treats. Now she equates the halter with good things and comes running when she sees it in my hand. She will even poke her head into it when I hold it open.