If a horse is pushy with his head and is intruding into your space, pushing his head away will only send him a “game on” message. Simply put your hand/arm up so that it aligns with the corners of the horse’s mouth (where the bit would go) to create a block or boundary. Do not push the horse’s head. The horse may try and push at your hand/arm to come into your space, however stand your ground with your block. Pushing back at the horse’s head is a “bully” approach. Establishing a simple, non threatening block will create respect and build trust.