What is a vicious habit of a horse; crib-biting. The horse lays hold of the crib or manger with his teeth and draws air into the stomach with a grunting sound called?

cribbing — A vicious habit of a horse; crib-biting. The horse lays hold of the crib or manger with his teeth and draws air into the stomach with a grunting sound. (Webster's 1913.)