I recently bought 6 horses who will arrive to our farm in 3 weeks. I have dealt a lot with horses, but have never been in charge of their feeding routine. I am also in Nicaragua where I don't know much about the nutritional facts on the available pasture grass. I will keep my horses in their stalls over night and out in pasture for about 3 hours per day until we get the arena built and then they will work about 1.5 hours/day. I am wondering if concentrated pellets and pasture grass is enough or if they will also need some type of hay in their stalls for when it is in between feeding time and pasture time. My concern is that with pellets and 3-4 hours a day of grazing, extra hay will make them fat. Any information would be much appreciated. I guess my main question is whether or not pasture grazing replaced hay or not?