Where does a Curb Chain fit on a horse?

Answer 1

A curb chain is part of a kimberwick or pelham bit. They are used when the second (lower) rein of a pelham bit is activated. The top rein is connected directly to the bit in the horses mouth and is the primary rein used to guide the horse. The lower rein is connected to the shank portion of the bit and is only used to activate the curb chain which runs under the horses chin.

A kimberwick also uses a curb chain but only utilizes one rein. There are 2 positions the rein can be attached to the bit, upper and lower. Attaching the rein at the upper position means the curb chain is utilized but very mildly. Attached the rein to the lower position brings the curb chain into play more forcefully.

Answer 2

A curb chain is attached to the curb bit of a bridle, running under the horse's chin groove. It helps provide leverage and control as pressure is applied to the horse's chin when the reins are engaged.

Answer 3

Under the chin.