I decided that I wanted to add alfalfa hay to our feeding. I've been feeding clover/orchard grass hay which is really nice green. I had to change places I got hay from to get alfalfa. Switched on Tuesday and now half my herd has diarhea. The hay I bought was pretty yellow 40% alfalfa/grass cross first cutting 2010. What can I do to help bind their stool until they adjust to the switch. I've heard old fashioned oats will help but do I feed it cooked or dry??