Perhaps: a hobble to prevent a horse from straying or kicking (= trammel, n.1 2).

? Some piece of horse-harness.

Some piece of horse harness: see quots.

A long rope used in training horses, being fastened at one end to the horse's head and held at the other by the trainer, who causes the horse to…

A long rein used in the training of horses or (occasionally) other animals; = lunge, n.1 2. Now rare.

(a) a long rope used in training horses; = lunge, n.1 2; (b) (in plural) a pair of very long reins used to school or control a horse from the ground.

A piece of leather fastened to the collar of a harness, which serves to protect the horse against sun or rain. Now rare (regional in later use).

A band of material used to wrap the legs of a horse for support or protection. Cf. boot, n.3 5.

A pad or covering strapped round a horse's fetlock for support or protection. Cf. boot, n.3 5.

a muzzle used for preventing a horse from feeding (cf. set, v.1 26d).

In extended use. A net placed over a horse's nose to protect it from flies. Obsolete. rare.

A rope for tying up or leading a horse, mule, etc., by the foot.

(probably) a strap attached to the girths and passing around the breast and shoulders of a horse from one side of the saddle to the other; cf. breast…

Saddlery. A leather shield placed under a buckle to protect the horse or saddle from chafing. rare.

attributive, as snubbing-line, snubbing-post.

The trappings of a horse; harness.

a muzzle worn by a horse to prevent crib-biting.