BCS continuously going up

[caters]

My mare Bella
is only fed grass from the pasture. She keeps gaining weight. 134% maintenance and 133% training as far as energy is concerned.

She started BCS 3: Thin and now she is BCS 9: Extremely Fat.

As far as I know, that is not good. My pasture has 21.3 kg of grass.

Shouldn't my horse be more around BCS 5: Moderate to BCS 7: Fleshy?

I am training her at least once every day and the rest of it goes to shows.

My stallion is BCS 3: Thin and has only been trained once.

Both are Arabian horses and my stallion is only .1 hands taller.

So why is the BCS continuously(like every 2-4 days) going up by 1 for my mare?

[Syn]

Horses kept on lush pasture will get fat. Your stallion will get fat eventually, too. They all do. There are two ways to combat this. You can either:

1. Keep the horses in a barn and consciously manage their feed, or

2. Start mowing your pasture and figure out what quality % results in your horses maintaining a decent condition.

Otherwise, your guys will just be blobs and there isn't much you can do about it. :p

[Kintara]

Or put more horses on your pasture so they eat all the feed. I don't mind mine fat, they don't do much anyway LOL!