How much alfalfa hay can a horse eat a day?

The amount of alfalfa hay a horse can eat will vary with the quality of the hay, it's protein level, the horses age, health, and activity level. It should be kept in mind that Alfalfa hay is very high in calcium and lower in Phosphorus which can cause an imbalance if fed in excess. It is recommended to only feed about half or less of what a horses normal feed ration would be if feeding alfalfa hay and to provide a ration balancer to level out the other nutrients.
The amount of alfalfa hay a horse can eat will vary with the quality of the hay, it's protein level, the horses age, health, and activity level. It should be kept in mind that Alfalfa hay is very high in calcium and lower in Phosphorus which can cause an imbalance if fed in excess. It is recommended to only feed about half or less of what a horses normal feed ration would be if feeding alfalfa hay and to provide a ration balancer to level out the other nutrients.