What is cribbing?
Cribbing is when a horse swallows air. Some horses do this by grasping a stationary object, such as a fence board or post, with their upper teeth, then arching their necks and pulling usually making a grunting sound. Other horses crib by resting their incisors on an object without grasping it, still others rest their chin on an object and swallow air. Some horses, however, do not use an object at all, but move their lips, close their mouths, flex and arch their necks, swallow air and grunt without grasping. Cribbing is often confused with wood chewing, another vice. Wood chewing however, is when a horse actually bites and chews wood, destroying fences and barns. Cribbing is also sometimes referred to as wind sucking, or swallowing.
Cribbing can lead serious health problems, such as poor digestion, colic, and various dental problems.
So, mine is a wood chewer
She does it because she is a brat. lol
If the gelding gets feed 1st, she takes out her frustration on the tree/fence etc
If the gelding goes for a ride and she doesnt, she chews
You get the picture.
Needless to say, she doesnt get put in a stall unless there is a blizzard or a tornado.