Hi, I've just started sharing a horse after years of riding at riding schools. I've been used to sluggish horses who are generally easy to handle. My share horse has been well schooled but is big and can throw his weight around, literally, when he doesn't want to do something. He's recently started to resist being bridled - he holds his head out of reach so I struggle to get it on. The last time this happened he broke his halter rope by pulling away. I don't want him to intimidate me - any suggestions on how I can manage this behaviour will be gratefully received!