Sheep Nutrition

Rams, Ewes, Lambs and Show Sheep formulas

Nature’s Formula IGF-1 feed additive is Copper Free and Safe for all biological groups of sheep

Understanding the role of IGF-1 in sheep can help in developing strategies to improve overall performance, with extensive research on the science based dietary interventions of Nature’s Formula IGF-1 feed additive to enhance growth and productivity in biological groups of sheep. The IGF-1 (Insulin-like Growth Factor-1) plays a significant role in sheep reproduction, lamb growth, and overall herd health.

IGF-1 and Growth:

General Growth Promotion:

IGF-1 is a polypeptide hormone (anabolic steroid) derived from carotenoids in green vegetation that promotes cell growth and differentiation, impacting tissue development, including muscle and bone from conception.

Maternal Influence:

Maternal IGF-1 levels can influence the birth weight and early growth of lambs. 

Muscle Development:

Numerous studies show that IGF-1 enhances muscle growth in lambs. 

Dietary Influence:

Dietary interventions, such as high concentrations of vitamin A found in Natures Formula IGF-1 feed additive, combined with superior sources of protein in lamb diets, can affect IGF-1 levels and contribute to improved growth performance.

Skeletal Growth:

IGF-1 is also crucial for skeletal growth and development in lambs. 

Age and Maturity:

IGF-1 concentrations tend to increase with age and body weight in lambs, which is why we decrease the levels of Nature’s Formula IGF-1 feed additive as they mature, fortifying your lambs, Overall Animal Nutrition provides you with a sliding scale of scheduled dietary platforms for the different stages of development over the course of each individual animal’s lifespan.

Research Findings

Clinical research on the IGF-1 gene polymorphism in sheep found that it can influence growth, body size, carcass traits, and meat quality. Clinical research on the relationship between IGF-1 and feed efficiency studies in lambs have shown that higher IGF-1 concentrations are associated with greater feed efficiency.

In conclusion, IGF-1 is a key regulator of growth in lambs, with its levels influenced by various factors and future studies into the role of IGF-1, which can lead to improved management and breeding practices for enhanced lamb production.

Commercial Sheep & Show Feed Formulations



Contains No Added Copper: Nature's Formula IGF-1 contains no added copper, allowing feed nutritionists to determine appropriate copper levels for sheep based on their specific dietary requirements.

Lamb Starter LS-12

Formulated for cubed, pellet and textured feeds.

12 pounds or 5.44 kilograms of Nature's Formula IGF-1 provides a guaranteed analysis of

  • 33,000 international units Vitamin A

  • 241.92 international units Vitamin D

  • 90,000 international units Vitamin E

  • 5 Mg Biotin Vitamin B7

  • 100 Mg Folic Acid Vitamin B9

  • 100 ppm (Min) Cobalt Carbonate

  • 360,000 ppm Organic Selenium

  • 8% Zin-Pro Organic Manganese

  • 8% Zin-Pro Organic Zinc

Lamb Grower. LG-10

Formulated for cubed, pelleted and textured feeds.

10 pounds or 4.5 4 kilograms of Nature's Formula IGF-1 provides a guaranteed analysis of:

  • 27,500 international units of Vitamin A

  • 201.6 international units of Vitamin D

  • 75,000 international units of Vitamin E

  • 4.166 Mg Biotin Vitamin B7

  • 83.33 Mg Folic Acid B9

  • 83.33 ppm Cobalt Carbonate

  • 300 ppm Organic Selenium

  • 8% Zin-Pro Organic Manganese

  • 8 % Zin-Pro Organic Zinc

Lamb Finisher. LF-8

Formulated for cubed, pelleted and textured feeds.

8 pounds or 3.63 kilograms of Natures Formula IGF-1 provides a guarantee analysis of

  • 22,000 international units of vitamin A

  • 161.28 international units of Vitamin D

  • 60,000 international units of Vitamin E

  • 3.3328 Mg Biotin Vitamin B7

  • 66.664 Mg Folic Acid B9

  • 66.664 ppm Cobalt Carbonate

  • 240 ppm Organic Selenium

  • 8% Zin-Pro Organic Manganese

  • 8 % Zin-Pro Organic Zinc

Breeding Sheep Formulas



Sheep Maintenance SM-5

Formulated for cubed, pelleted and textured feeds.

5 pound or 2.27 Kilograms of Natures Formula IGF-1 provides a guaranteed analysis of

  • 13,750 international units of Vitamin A

  • 100.8 international units of Vitamin D

  • 37,500 international units of Vitamin E

  • 2.083 mg Biotin Vitamin B7

  • 41.665 Mg Folic Acid B9

  • 41.665 ppm Cobalt Carbonate

  • 150 ppm Organic Selenium

  • 8% Zin-Pro Organic Manganese

  • 8% Zin-Pro Organic Zinc

Sheep Breeder R&E-10

Ram & Ewe — Summer & Fall Formula.
Formulated for cubed, pelleted and textured feeds.

10 pounds or 4.5 4 kilograms of Nature's Formula IGF-1 provides a guaranteed analysis of

  • 27,500 international units of Vitamin A

  • 201.6 international units of Vitamin D

  • 75,000 international units of Vitamin E

  • 4.166 Mg Biotin Vitamin B7

  • 83.33 Mg Folic Acid B9

  • 83.33 ppm Cobalt Carbonate

  • 300 ppm Organic Selenium

  • 8% Zin-Pro Organic Manganese

  • 8 % Zin-Pro Organic Zinc

Research on the IGF-1 gene polymorphism in sheep found that it can influence growth, body size, carcass traits, and meat quality.

Ewe Conditioner EC-10

Winter Formula.
Formulated for cubed, pelleted and textured feeds.

10 pounds or 4.5 4 kilograms of Nature's Formula IGF-1 provides a guaranteed analysis of

  • 27,500 international units of Vitamin A

  • 201.6 international units of Vitamin D

  • 75,000 international units of Vitamin E

  • 4.166 Mg Biotin Vitamin B7

  • 83.33 Mg Folic Acid B9

  • 83.33 ppm Cobalt Carbonate

  • 300 ppm Organic Selenium

  • 8% Zin-Pro Organic Manganese

  • 8 % Zin-Pro Organic Zinc

Ewe & Lamb — Spring & Summer #7

Formulated for cubed, pelleted and textured feeds.

Maternal Influence: Maternal IGF-1 levels can influence the birth weight and early growth of lambs.

7 pounds or 3.18 kilograms o f Nature's Formula IGF-1 provides a guaranteed analysis of

  • 19,250 international units of vitamin A

  • 141.12 international units of Vitamin D

  • 52,500 international units of Vitamin E

  • 2.1962 mg Biotin Vitamin B7

  • 58.331 Mg Folic Acid B9

  • 58.331 p p m Cobalt Carbonate

  • 210 p p m Organic Selenium

  • 8% Zin-Pro Organic Manganese

  • 8 % Zin-Pro Organic Zinc

Educational Resources

LOCALIZATION OF IGF-I & II mRNA AND TYPE 1 IGF RECEPTORS IN OVINE UTERUS DURING ESTROUS CYCLE & EARLY PREGNANCY
Endocrinology, Volume 134, Issue 4, 1 April 1994, Pages 1655–1664


THE INFLUENCE OF MATERNAL IGF‐1 GENOTYPE ON BIRTHWEIGHT AND GROWTH RATE OF LAMBS
New Zealand Journal of Agricultural Research


CONCENTRATIONS OF IGF-1 IN SERUM OF SHEEP WITH DIFFERENT OVULATION RATES: CHANGES DURING ESTROUS CYCLE
Courtesy of Oklahoma State University

Designed to Fortify from Conception to Consumption

Nature’s Formula IGF-1 is manufactured and distributed by NutraBlend LLC and is readily available as a floor stock item to independent feed manufacturers across America. NutraBlend sales representatives can help customers order as little as one bag, making it easy to access a product backed by scientific research into green vegetative components that stimulate growth factors in ruminants and support targeted nutritional fortification.