There were some nasty, personal posts and some back and forth not even involving OP or this horse. They were very quickly removed, especially towards the end when Mods got involved.
Got no problem with disagreeing or even arguing, all information has value, even if you disagree but this went too far.
ETA, two thoughts….
Where I have kept horses outside, we fed hay in mangers, tubs or nets to try to keep it off the bare ground. It still got thrown around but in greatly reduced quantity. Whether from rain or pee, once wet hay can get mixed into muddy ground and create an undesirable odor plus attract an assortment of insects and those lovely grubs.
Long ago picked up a fish scale in the fishing section of a sporting goods store, pretty cheap. Started weighing a flake or serving of hay. Just an example here but lets say an average sized adult horse needs 20/25 pounds of hay daily. How do you know how many pounds your hay flakes or servings weigh? Even if its free fed, you need to know how much she is consuming to be sure shes getting enough calories in.
With grain/concentrates, you need to know what whatever she gets actually weighs…a 3lb can, for example, may hold 3lbs of coffee or green beans but only 2lbs of your grain/ concentrates, or 5lbs. You need to know. Same thing with scoops, how much does it really weigh?
Not saying you march around weighing every feeding, don’t need to do that. Once you establish how much it actually weighs, you can adjust as needed.
Soo…go get a fish scale and see how much that full hay net really weighs…is it 12lbs? 17lbs? 20lbs?
The above is somewhat simplistic but sometimes simple is easier to understand to get started being aware of actual caloric intake.