Thanks everyone for posting. This thread has turned out to be a really educational one. You all are so smart about horse nutrition...I think I need to do some research and learn more myself. I've owned my horse a couple of years, but all I've learned about horse nutrition from him is that if he gets fat take away some feed, if he gets thinner add some. He is a really easy keeper...sometimes to easy in my opinion. I'd like for him to be able to have grain for nutritional purposes, but he just gets so FAT! Hope on the other hand is forcing me to learn all about horse nutrition. I have added alfalfa cubes to her diet and will not be adding any supplements until I am sure the alfalfa isn't going to be a problem. She is eating them, but only if there are just a couple in there...but hopefully, when she gets used to them I can add more. Anyway, that should give me a few weeks to look into your recommend supplements and figure out which one will be the best for her. I will be taking money into consideration also when choosing a supplement....not that I would rule out a great supplement because of that, but if I can find a really good one for cheaper, then that's what'd I'd like to do. Senior horses aren't cheap (well, maybe in price, but you know what I mean), plus on top of the two bags of feed she eats a week and the alfalfa, she is going to have to see the vet again this week for a lameness issue that has sprung up. Anyway, thank you all so much for your help...hugssss to you!