Vitamin A is required for normal vision, for the skin and other epithelia, and bone formation.
Vitamin A deficiency may lead to poor vision at dusk and during darkness, runny eyes, weak and scaly skin, loss of appetite, reduced growth rate, poor conception rates and general weakness.
Concentrates and most vitamin/mineral mixtures for horses contain ample amounts of vitamin A. Cod liver oil, carrots, green grasses, haylage and well cured hay are all good sources of vitamin A. #Grasses and haylage also contain beta-carotene which forms vitamin A in the body.