Nutrena Horse Block is for maintenance horses. This block may be fed free choice or at the rate of .25 to .50 lbs per 100 lbs. bodyweight along with roughage or pasture equivalent at the rate of 1 to 1.75 lbs per 100 lbs of bodyweight daily. Provide fresh, clean water at all times except to hot, tired horses. Horses should be cooled out properly before having access to unlimited water or being fed. CAUTION: Contains high levels of copper, do not feed to sheep. | Nutrena Horse Block | Size 21 lbs