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Veterinary

Estimated Minimum Daily Major Nutrient Requirements of Growing Horses and Ponies

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			----------------------------Daily Nutrients Per Animal^a---------------------------
Age, mo	Body Weight, kg	Daily Gain, kg	Digestible Energy, Mcal	Crude Protein, g	Ca, g	P, g	Vitamin A, IU^b
*Estimated adult weight 200 kg (ponies)*
4	67	0.34	5.3	268	15.6	8.7	3,000
6	86	0.29	6.2	270	15.5	8.6	3,900
12	128	0.18	7.5	338	15.1	8.4	5,800
18	155	0.11	7.7	320	14.8	8.2	7,000
24	172	0.07	7.5	308	14.7	8.1	7,700
*Estimated adult weight 500 kg (average horses)*
4	168	0.84	13.3	669	39.1	21.7	7,600
6	216	0.72	15.5	676	38.6	21.5	9,700
12	321	0.45	18.8	846	37.7	20.9	14,500
18	387	0.29	19.2	799	37.0	20.6	17,400
24	365	0.18	18.7	770	36.7	20.4	19,300
*Estimated adult weight 900 kg (draft horses)^c*
4	303	1.52	23.9	1,204	70.3	39.1	13,600
6	389	1.30	28.0	1,217	69.5	38.7	17,500
12	578	0.82	33.8	1,522	67.8	37.7	26,000
18	697	0.51	34.6	1,438	66.7	37.1	31,400
24	773	0.324	39.2	1,492	66.0	36.7	34,800
Abbreviations: Ca, calcium; P, phosphorus.
Adapted from Nutrient Requirements of Horses. 6th ed. National Resource Council. National Academies Press; 2007.
^a Assumes good-quality forage with or without additional concentrates. Maximal daily intake is estimated to be 2.5–3% body weight in dry matter.
^b One mg of beta carotene is equivalent to 400 IU of the active form of vitamin A for the horse. ^c Exact recommendations may vary based on breed and expected mature body weight.