Strong horse when leading!?

New horse is strong to lead in from the feild, he is fine to catch but when you bring him out of his feild his companion starts prancing around and calling. This sets off my horse and he starts trying to spin round and pull. It is hard for me to hold him because he is a young strong welsh cob. I thought of using polos to get his attention when he starts playing up or should i try leading him in a bridle? However he has bolted from me before so i wouldnt want him to get caught in the reins!