As for your guys's feeding schedule lol you guys are crazy! I don't feed twice a day. The horses get fed once. And the horse who was pregnant and just had the baby gets fed twice. I fed her around 6:30-8 anywhere in there and she got 4 flakes of hay. And then all of the horses(momma horse included!) get fed at 3-8pm and they get 4 quarts of all grain. And get 1 square bale to share(momma gets 4 more flakes to herself). And they are healthy as can be.
Things my way have worked for me. But all horses are different and all of mine seem to be easy keepers so this works well for me.