10.6
To begin with, you should possess two bits at least.See Introduction. One of these should be smooth and have the discs of a good size; the other should have the discs heavy and low, and the teeth sharp, so that when the horse seizes it he may drop it because he objects to its roughness, and when he is bitted with the smooth one instead, may welcome its smoothness and may do on the smooth bit what he has been trained to do with the aid of the rough one.
10.7
In case, however, he takes no account of it because of its smoothness, and keeps bearing against it, we put large discs on the smooth bit to stop this, so that they may force him to open his mouth and drop the bit. It is possible also to make the rough bit adaptable by wrappingSo as to mitigate the roughness of the teeth. This was sometimes done by covering the teeth with wax (Pollux. 1.207). it up and tightening the reins.See c. ix, § 9.
10.8
But whatever be the pattern of the bits, they must all be flexible. For wherever a horse seizes a stiff one, he holds the whole of it against his jaws, just as you lift the whole of a spit wherever you take hold of it.
