Selenium Deficiency in Lambs: White Muscle Disease Prevention

Selenium and vitamin E deficiency in lambs causes white muscle disease, a painful and often fatal condition affecting cardiac and skeletal muscle that is entirely preventable through nutritional management.

Key Facts

White muscle disease results from selenium and/or vitamin E deficiency causing oxidative damage to muscle tissue
Cardiac and skeletal muscle are primarily affected with weakness, stiffness, and sudden death from cardiac failure
Affected lambs may appear normal at birth but develop signs within weeks or when exercised
Selenium status varies considerably by geographic region with many areas having selenium-deficient soils
Supplementation of ewes before lambing through injection or dietary supplementation prevents disease in offspring
Selenium toxicity is possible with excessive supplementation making accurate dosing critical
Rapid diagnosis and selenium injection can save affected lambs if given before irreversible cardiac damage

Welfare Considerations

White muscle disease causes severe muscle pain and weakness in affected lambs. Cardiac muscle involvement leads to sudden death, depriving lambs of life before welfare consequences become prolonged. Skeletal muscle disease causes inability to stand, feed, or escape from environmental challenges, leading to starvation, exposure, and predation in severe cases. The condition is entirely preventable through appropriate maternal supplementation. Farms in selenium-deficient areas failing to supplement ewes are causing preventable suffering that represents an avoidable welfare failure and should be addressed through veterinary nutritional guidance.

What You Can Do

Test soil and forage selenium status if farming in regions suspected of selenium deficiency
Work with your veterinarian to develop an appropriate ewe supplementation protocol before lambing
Administer selenium supplements at correct doses under veterinary guidance to avoid toxicity
Monitor lambs in the first weeks of life for signs of stiffness, weakness, or sudden death
Seek immediate veterinary treatment with selenium and vitamin E injection for any lambs showing white muscle disease signs
Keep records of supplementation and disease incidence to monitor program effectiveness
Test blood selenium levels in ewes and lambs to verify supplementation adequacy