Chin Groove
the part of the horse’s head behind the lower lip and chin, the area that dips down slightly on the lower jaw; area where the curb chain of certain bits is fastened
https://en.wikipedia.org/wiki/Glossary_of_equestrian_terms
the part of the horse’s head behind the lower lip and chin, the area that dips down slightly on the lower jaw; area where the curb chain of certain bits is fastened
https://en.wikipedia.org/wiki/Glossary_of_equestrian_terms