Hypovitaminosis A
- Vitamin A is essential for normal bone growth in foetus and neonates
- Hypovitaminosis from dietary deficiency of dam -> teratogenic in pigs and large cats
- More commonly, deficiency in neonates (puppies, kittens, calves, piglets) on vitamin-deficient diets
- Dietary deficiency -> failure of osteoclastic remodelling resulting in bone overgrowth and nerve compression
- Optic nerves particularly affected