I am technically poor(not saying this for sympathy-I don't feel poor BUT can't spend $4 a day for horse feed!) and neighbor has generously given permisson to use his fenced in 2 acres and my ground is pretty much chewed up SO(have 6 bale hay left) need thoughts on suppliments*(food) for 11 yr. old mare? Pet only. I know there are supposedly complete feeds(grass hay based) available and beet pulp cqan fill her tummy but have never had to do this so any experience with this is appreciated????????? THANKS(have calls in for hay ads but no returns or no hay)