Nowhere did I, or anyone else say, that she was underfeeding.
As I understand her original post, she's asking if her hypothetical future pasture and feeding plan were adequate.
Again, as I understood it, she was saying she was planning on feeding *one* 65 -75 pound bale per day for 5 horses turned out 24/7 on 2.5 acres and being fed grain one time per day.
Since 5 horses on 2.5 acres will mean no useful grazing or forage, I am saying that the proposed hay isn't adequate. I stand by that. If she is, in fact, saying she's feeding one bale *per horse per day* then the hay is adequate, but the rest of the proposed situation is still not workable.
If it's the lower amount of hay, and they're only being grained once per day, even with beet pulp or other forage extenders, it's still an iffy plan because you'll have extended periods when the horses have nothing in their digestive tracts.
If I've misread the OP's original post; or if I misunderstood what was being proposed about hay; then I'll revise my opinion.
ETA: Check your math. A 65 # bale is 7% of a 900 # horse's body weight. And the 65# bale divided 5 ways is 13# per horse, or 1.4% of body weight - still not enough forage, IMO and IME.
Last edited by maura; 05-11-2012 at 08:16 PM.