alfalfa has a good ratio of calc/phos, at least in my area. Grass hay gets very low in Calc. Beet pulp shreds I always fed soaked. You can find sr feed without all the sugars, Nutrena has a feed. Special Care feed. I also feed alfalfa in the am and a oat/grain hay at night. Some horses cannot handle the proteins in straight alfalfa, plus the mix of the diff hay types reduces stones . My last true senior horse (33) had been put down a couple weeks ago, he got injured and never properly healed . :( . The others are just older 18 -20 and some younger ones 13-15 stay fat on the hay mix.