Livestock

Vitamin D and Bone Health in Housed Cattle

How vitamin D deficiency affects cattle welfare during prolonged winter housing.

Key Facts

Cattle synthesise vitamin D through sunlight exposure — housing limits this
Deficiency affects calcium metabolism, bone health, and immune function
Dietary supplementation maintains adequate levels in housed cattle
Rickets in calves and milk fever risk in cows are linked to vitamin D status

Welfare Considerations

Vitamin D deficiency in housed cattle has welfare consequences through impaired immune function and skeletal health. Calves born to deficient dams are more susceptible to neonatal disease. Welfare-informed supplementation protocols ensure adequate vitamin D through dietary supplementation during housing periods and early post-housing. UV light provision in some advanced housing systems may also address deficiency.

What You Can Do

Include vitamin D in winter mineral supplementation programmes for housed cattle
Monitor calf health and growth rates as early welfare indicators of vitamin D status
Work with your vet to check blood mineral status in herds with unexplained production problems