How Much Vitamin A Does A Horse Need Daily?
How Much Vitamin A Does A Horse Need Daily? The vitamin A requirement of adult horses at maintenance is 30 IU/kg (1 kg equals 2.2 pounds) of body weight. For growing and exercising horses, it is 45 IU/kg of body weight. A 500-kg (1,100-pounds) horse would therefore need 15,000 IU of vitamin A per day