Originally Posted by Indyhorse
Just a random thought here, I am no where near as experienced as Peggy in these things. But the website Peggy provided you, Equi-analytical labs, also provides a service where they can content test your grass/pasture, as well as your hay (They are the company that tests my hay as well). I know you said your barn has tons of grass so you don't feed hay, but it might be worth finding out what nutritional value the grass is actually providing, although you could only estimate at best how much he is actually consuming.
No, we do not feed baled hay
. As a barn, we feed hay cubes....cuts down the waste to nothing (horses can't drop them from their mouth, doesn't get all over the barn aisle, etc). In addition I personally also feed him hay pellets. The grass is merely his long-stem munching time versus baled hay. But rest assured, he is getting 13 pounds of hay per day.
I could guess, but I would probably be wrong....sometimes he takes 4 or 5 bites at a time before swallowing, so I would be underestimating, if anything!
Honestly, I live in Florida, and we have sand for soil. I know that the grass isn't good for much more than munching on, unless you have a mini or a really hardy quarter horse.