Feed and forage
Hay and forage is a complete food source for most horses.
Grazing pasture grass should be 4" or higher.
Horses need a constant supply of forage.
An average horse weighs 1000# so each horse needs about 20# of hay per day on hand..
Overgrazed pastures or insufficient supply of hay on hand.
Silage and corn stalks are not suitable forage for horses.