Hay or grazing should make up the highest percentage of their feed period. Right now I have four horses and four ponies in my largest pasture on a round bale. They usually need a new one every two weeks. We also feed a pelleted hay feed mix with stradgey twice a day. Just enough to add in extra vitamins and such they need. All of them are doing very well. All of that herd is very young...oldesnt being 6 years old. Now my older crew has a round bale. They are two older cutters 23 and 25. Their bale usually lasts a month to 6 weeks. And we feed them one flake of Alfalfa to share a day....mind you they are still working....and senior feed twice a day. They are fat, healthy and full of themselves on that.
Now at the other ranch I work at we are putting out at least one square bale a day for the Arab and Peruvian to share. Plus the barn help feeds once a day. The pastures are lush there even in the winter because of the amount of fertizler the owner puts on the place. And they are rotated into different pastures all year long so it isn't grazed down. Now, they have a Warmblood over there also. He is taking on a square bale of hay a day, plus a flake of Alfalfa and grain once a day. I will be upping the amount of hay for him as soon as we get some hauled. I would like to see him put on a round bale to help him maintain a better weight.
Also it might be time to have their teeth done. I know I need one of mine done here soon.