How much beet pulp should I feed?

What I have always heard is you have to soak beet pulp or when they take a drink of water it will expand in there stomach (that is what I have heard) and I would think 1-2 lbs. But instead of feeding him beet pulp things that can help in cress his weight. Feed him smaller meals more often since horses have small stomachs and short intestines they cannot handle large amounts of grain at one time so they should be fed frequently, but in small amounts (3+ times daily). A regularly worked horse might receive five to ten pounds of grain per day. More feed should be given to a horse who has worked harder or to a larger horse, and less feed to a smaller horse or one who has worked less. This varies with each horse and also varies depending on the quality of the grain. As for hay give 1 pound of hay per 100 pounds of body weight. So, a 1,000 pound horse would have a minimum of 10 pounds of hay. This varies greatly, depending on the amount of work the horse is asked to do, and on the type of hay that is fed. It is best to allow horses to eat free-choice hay throughout the day to promote the health of their digestive systems.