I feed my 30 yr old appy Beet pulp and Alfalfa pellets soaked if needed. Beet pulp is an excellent source of fiber and is easily eaten by horses who cannot eat hay etc. Another feed I uise and love is Total Equine
. This is an extruded feed that is fed with NO grains. You can feed anywhere from 2# twice a day on up to full feed if necessary. It is not available everywhere.. Check the site if you are interested.