Veterinary advice should be sought from your local veterinarian before applying any treatment or vaccine. Not sure who to use? Look up veterinarians who specialize in poultry using our directory listing. Find me a Vet
Vitamin A Deficiency
Other Names: Roup, Hypovitaminosis A, Follicular Hypeerkeratosis, Phrynoderma, Squamous Cell Hyperplasia
Chickens with vitamin A deficiency (also referred to as hypovitaminosis A) have an increased risk of getting sick. No nutritional deficiency is more synergistic with infection than vitamin A. The 2 main mechanisms involved in the prevention of disease are the effect of vitamin A on the immune system and on epithelial integrity.
Vitamin A deficiency can occur as a result of malnutrition, unbalanced diet, or as a secondary result from their body's inability to absorb or store vitamin A. Vitamin A deficiency presents as a number of different clinical manifestations, ranging from xerophthalmia (dry eye), uropygial gland infection, impaired growth, and increased susceptibility to severe infection. It affects ocular tissue in two ways: by slowing the regeneration of the visual pigments following exposure to bright light and by disrupting epithelial integrity.
Increase access to green forage and scratching soils for insects, many of which contain high amounts of vitamin A. Purchase smaller quantities of feed so that your not feeding stale food to your flock.
Add vitamin A rich foods to rations
Cod liver oil
Mixed within feed ration at the rate of 2 tablespoons per 5 lb (65 mL per 5 kg), however used sparingly.
Chen F, Jiang Z, Jiang S, Li L, Lin X, Gou Z, Fan Q. Dietary vitamin A supplementation improved reproductive performance by regulating ovarian expression of hormone receptors, caspase-3 and Fas in broiler breeders.. Poult Sci. (2015)