6.8
If he takes the bit, of course the bridle should be put on. But if he refuses to open his mouth, the man must hold the bit to his teeth and put the thumb of the left hand in the horse’s jaw. Most horses open the mouth when this is done. If he still resists, the man should squeeze his lip against the tusk; and very few resist when they are treated in this way.
6.9
The groom should also be instructed in the following points: first, never to lead the horse on the rein—that gives the horse a hard mouth on one side—and secondly, what is the correct distance from the bit to the jaws. For if it is too high up, it hardens the mouth so that it loses its sensitiveness; and if it lies too low in the mouth, it gives the horse power to take it between his teeth and refuse to obey.
6.10
The groom must also pay some attention to such points as the following: whether the horse will not easily take the bit when he knows that he has work to do. Willingness to receive the bit is, in fact, so important that a horse that refuses it is quite useless.
6.11
But if he is bridled not only when he is going to be ridden, but also when he is taken to his food and when he is led home from exercise, it would not be at all surprising if he seized the bit of his own accord when offered to him.
