There are several reasons why a horse would chew on boards.
1: Lack of fiber in the diet. If a horse does not get enough fiber in it's diet it will typically begin trying to eat wood in the form of board or even tree bark.
2: Lack of 'chew time'. This usually accompanies reason1. A horse is designed to eat small amounts of high fiber food all day long. A lot of modern horses do not get the amount of feed and thus chew time that they need. When this is lacking they will find a way to make 'chew time' for themselves.
3: Ulcers/stress. A horse with high levels ( and/ or a high grain diet) of stress is likely to develop ulcers, The horse will then begin to crib or wind-suck to bring air into the mouth in an attempt to relieve the pain from the ulcers.
Always have a knowledgeable equine veterinarian exam your horse if you notice unusual behaviour.
Horses chew their hay or grains in their mouth with their teeth so that it is easier for their stomach to digest. Horses chew from side to side as in a motion of a grinder.
they chew on food
To chew their food.
Horses chew wood but they gain no nutritional benefit from wood.
they eat with there mouths and chew with there teeth
Same as domestic horses; teeth developed to chomp down on and chew grass.
maybe the "greys" teeth are coming or they hurt basically they have to chew to make their teeth strong.
Cows, and any animals that chew cud (ruminants), have a four chambered stomach. Horses do not chew cud and only have a one-chambered stomach. (pseudo-ruminant monogastrics.)
Horses can't actually cut through would, but they do chew on it (usually called cribbing).
Grass is really hard to digest so they have to chew down the cell wall of the plant to digest it otherwise it'll come out exactly the way it was when it was eaten.
i think its cuz they need it to chew their food
Horses chew by moving their lower jaw in an oval pattern because their lower jaw is narrower than the upper jaw. As the jaw closes, it moves from one side to the other. As it opens it returns to the original position.