Nutrient Requirements of Sheep

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Source: National Research Council, Nutrient Requirements of Sheep (1985)

Mature Ewes

Table 1. Nutrients requirements (concentration in diet dry matter) of mature ewes
	Weight (lb)	Wt Change (lb/day)	DM Intake (lb)	DM Intake (%BW)	TDN (lb)	TDN (%)	Protein (lb)	Protein (%)	Ca (g)	P (g)	Vitamin A (IU)	Vitamin E (IU)
Maintenance	110	0.02	2.2	2.00%	1.2	54.55%	0.21	9.55%	2	1.8	2,350	15
	132	0.02	2.4	1.82%	1.3	54.17%	0.23	9.58%	2.3	2.1	2,820	16
	154	0.02	2.6	1.69%	1.5	57.69%	0.25	9.62%	2.5	2.4	3,290	18
	176	0.02	2.9	1.65%	1.6	55.17%	0.27	9.31%	2.7	2.8	3,760	20
	198	0.02	3.1	1.57%	1.7	54.84%	0.29	9.35%	2.9	3.1	4,230	21
Flushing - 2 Weeks prebreeding and first 3 weeks of breeding	110	0.22	3.5	3.18%	2.1	60.00%	0.33	9.43%	5.3	2.6	2,350	24
	132	0.22	3.7	2.80%	2.2	59.46%	0.34	9.19%	5.5	2.9	2,820	26
	154	0.22	4	2.60%	2.3	57.50%	0.36	9.00%	5.7	3.2	3,290	27
	176	0.22	4.2	2.39%	2.5	59.52%	0.38	9.05%	5.9	3.6	3,760	28
	198	0.22	4.4	2.22%	2.6	59.09%	0.39	8.86%	6.1	3.9	4,230	30
Nonlactating - First 15 weeks gestation	110	0.07	2.6	2.36%	1.5	57.69%	0.25	9.62%	2.9	2.1	2,350	18
	132	0.07	2.9	2.20%	1.6	55.17%	0.27	9.31%	3.2	2.5	2,820	20
	154	0.07	3.1	2.01%	1.7	54.84%	0.29	9.35%	3.5	2.9	3,290	21
	176	0.07	3.3	1.88%	1.8	54.55%	0.31	9.39%	3.8	3.3	3,760	22
	198	0.07	3.5	1.77%	1.9	54.29%	0.33	9.43%	4.1	3.6	4,230	24
Last 4 weeks gestation (130-150% lambing rate expected) or last 4-6 weeks lactation suckling singles	110	0.40 (0.10)	3.5	3.18%	2.1	60.00%	0.38	10.86%	5.9	4.8	4,250	24
	132	0.40 (0.10)	3.7	2.80%	2.2	59.46%	0.4	10.81%	6	5.2	5,100	26
	154	0.40 (0.10)	4	2.60%	2.3	57.50%	0.42	10.50%	6.2	5.6	5,950	27
	176	0.40 (0.10)	4.2	2.39%	2.4	57.14%	0.44	10.48%	6.3	6.1	6,800	28
	198	0.40 (0.10)	4.4	2.22%	2.5	56.82%	0.47	10.68%	6.4	6.5	7,650	30
Last 4 weeks gestation (180-225% lambing rate expected)	110	0.5	3.7	3.36%	2.4	64.86%	0.43	11.62%	6.2	3.4	4,250	26
	132	0.5	4	3.03%	2.6	65.00%	0.45	11.25%	6.9	4	5,100	27
	154	0.5	4.2	2.73%	2.8	66.67%	0.47	11.19%	7.6	4.5	5,950	28
	176	0.5	4.4	2.50%	2.9	65.91%	0.49	11.14%	8.3	5.1	6,800	30
	198	0.5	4.6	2.32%	3	65.22%	0.51	11.09%	8.9	5.7	7,650	32
First 6-8 weeks lactation suckling singles or last 4-6 weeks lactation suckling twins	110	-0.06	4.6	4.18%	3	65.22%	0.67	14.57%	8.9	6.1	4,250	32
	132	-0.06	5.1	3.86%	3.3	64.71%	0.7	13.73%	9.1	6.6	5,100	34
	154	-0.06	5.5	3.57%	3.6	65.45%	0.73	13.27%	9.3	7	5,950	38
	176	-0.06	5.7	3.24%	3.7	64.91%	0.76	13.33%	9.5	7.4	6,800	39
	198	-0.06	5.9	2.98%	3.8	64.41%	0.78	13.22%	9.6	7.8	7,650	40
First 6-8 weeks lactation suckling twins	110	-0.13	5.3	4.82%	3.4	64.15%	0.86	16.23%	10.5	7.3	5,000	36
	132	-0.13	5.7	4.32%	3.7	64.91%	0.89	15.61%	10.7	7.7	6,000	39
	154	-0.13	6.2	4.03%	4	64.52%	0.92	14.84%	11	8.1	7,000	42
	176	-0.13	6.6	3.75%	4.3	65.15%	0.96	14.55%	11.2	8.6	8,000	45
	198	-0.13	7	3.54%	4.6	65.71%	0.99	14.14%	11.4	9	9,000	48

Ewe Lambs and Ram Lambs

Table 2. Nutrients requirements (concentration in diet dry matter) of ewe lambs and ram lambs
	Weight (lb)	Wt Change (lb/day)	DM Intake (lb)	DM Intake (%BW)	TDN (lb)	TDN (%)	Protein (lb)	Protein (%)	Ca (g)	P (g)	Vitamin A (IU)	Vitamin E (IU)
Nonlactating - First 15 weeks gestation	88	0.35	3.1	3.52%	1.8	58.06%	0.34	10.97%	5.5	3	1,880	21
	110	0.3	3.3	3.00%	1.9	57.58%	0.35	10.61%	5.2	3.1	2,350	22
	132	0.3	3.5	2.65%	2	57.14%	0.35	10.00%	5.5	3.4	2,820	24
	154	0.28	3.7	2.40%	2.2	59.46%	0.36	9.73%	5.5	3.7	3,290	26
Last 4 weeks gestation (100-120% lambing rate expected)	88	0.4	3.3	3.75%	2.1	63.64%	0.41	12.42%	6.4	3.1	3,400	22
	110	0.35	3.5	3.18%	2.2	62.86%	0.42	12.00%	6.3	3.4	4,250	24
	132	0.35	3.7	2.80%	2.4	64.86%	0.42	11.35%	6.6	3.8	5,100	26
	154	0.33	4	2.60%	2.5	62.50%	0.43	10.75%	6.8	4.2	5,950	27
Last 4 weeks of gestation (130-175% lambing rate expected)	88	0.5	3.3	3.75%	2.2	66.67%	0.44	13.33%	7.4	3.5	3,400	22
	110	0.5	3.5	3.18%	2.3	65.71%	0.45	12.86%	7.8	3.9	4,250	24
	132	0.5	3.7	2.80%	2.5	67.57%	0.46	12.43%	8.1	4.3	5,100	26
	154	0.47	4	2.60%	2.5	62.50	0.46	11.50%	8.2	4.7	5,950	27
First 6-8 weeks lactation suckling singles (wean by 8 weeks)	88	-0.11	3.7	4.20%	2.5	67.57%	0.56	15.14%	6	4.3	3,400	26
	110	-0.11	4.6	4.18%	3.1	67.39%	0.62	13.48%	6.5	4.7	4,250	32
	132	-0.11	5.1	3.86%	3.4	66.67%	0.65	12.75%	6.8	5.1	5,100	34
	154	-0.11	5.5	3.57%	3.6	65.45%	0.68	12.36%	7.1	5.6	5,450	38
First 6-8 weeks lactation suckling twins (wean by 8 weeks)	88	-0.22	4.6	5.23%	3.2	69.57%	0.67	14.57%	8.4	5.6	4,000	32
	110	-0.22	5.1	4.64%	3.5	68.63%	0.71	13.92%	8.7	6	5,000	34
	132	-0.22	5.5	4.17%	3.8	69.09%	0.74	13.45%	9	6.4	6,000	38
	154	-0.22	6	3.90%	4.1	68.33%	0.77	12.83%	9.3	6.9	7,000	40
Replacement ewe lambs	66	0.5	2.6	3.94%	1.7	65.38%	0.41	15.77%	6.4	2.6	1,410	18
	88	0.4	3.1	3.52%	2	64.52%	0.39	12.58%	5.9	2.6	1,880	21
	110	0.26	3.3	3.00%	1.9	57.58%	0.3	9.09%	4.8	2.4	2,350	22
	132	0.22	3.3	2.50%	1.9	57.58%	0.3	9.09%	4.5	2.5	2,820	22
	154	0.22	3.3	2.14%	1.9	57.58%	0.29	8.79%	4.6	2.8	3,290	22
Replacement ram lambs	88	0.73	4	4.55%	2.5	62.50%	0.54	13.50%	7.8	3.7	1,880	24
	132	0.7	5.3	4.02%	3.4	64.15%	0.58	10.94%	8.4	4.2	2,820	26
	176	0.64	6.2	3.52%	3.9	62.90%	0.59	9.52%	8.5	4.6	3,760	28
	220	0.55	6.6	3.00%	4.2	63.64%	0.58	8.79%	8.2	4.8	4,700	30

Growing and Finishing Lambs

Table 3. Nutrients requirements (concentration in diet dry matter) of growing and finishing lambs
	Weight (lb)	Wt Change (lb/day)	DM Intake (lb)	DM Intake (%BW)	TDN (lb)	TDN (%)	Protein (lb)	Protein (%)	Ca (g)	P (g)	Vitamin A (IU)	Vitamin E (IU)
Lambs finishing 4-7 months old	66	0.65	2.9	4.39%	2.1	72.41%	0.42	14.48	6.6	3.2	1,410	20
	88	0.6	3.5	3.98%	2.7	77.14%	0.41	11.71%	6.6	3.3	1,880	24
	110	0.45	3.5	3.18%	2.7	77.14%	0.35	10.00%	5.6	3	2,350	24
Early weaned lambs - Moderate growth potential	22	0.44	1.1	5.00%	0.9	81.82%	0.38	34.55%	4	1.9	470	10
	44	0.55	2.2	5.00%	1.8	81.82%	0.37	16.82%	5.4	2.5	940	20
	66	0.66	2.9	4.39%	2.2	75.86%	0.42	14.48%	6.7	3.2	1,410	20
	88	0.76	3.3	3.75%	2.6	78.79%	0.44	13.33%	7.7	3.9	1,880	22
	110	0.66	3.3	3.00%	2.6	78.79%	0.4	12.12%	7	3.8	2,350	22
Early weaned lambs - Rapid growth potential	22	0.55	1.3	5.91%	1.1	84.62%	0.35	26.92%	4.9	2.2	470	12
	44	0.66	2.6	5.91%	2	76.92%	0.45	17.31%	6.5	2.9	940	24
	66	0.72	3.1	4.70%	2.4	77.42%	0.48	15.48%	7.2	3.4	1,410	21
	88	0.88	3.3	3.75%	2.5	75.76%	0.51	15.45%	8.6	4.3	1,880	22
	110	0.94	3.7	3.36%	2.8	75.68%	0.53	14.32%	9.4	4.8	2,350	25
	132	0.77	3.7	2.80%	2.8	75.68%	0.53	14.32%	8.2	4.5	2,820	25

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