Skin Nutritional - Pathology
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General
- Often combined deficiency which improves when animal is fed a balnced diet
- Sometimes caused by change in demand (pregnancy, growth, cold weather) or due to disease
Zinc Deficiency
Copper Deficiency
- Hair or wool depigmentation
- Black sheep develop bands of lighter colouring
- Cattle develop spectacle pattern of depigmentation around eyes)
- Coat colour may change from black to reddish brown
Vitamin A Deficiency
- In dogs
- Grossly: generalised scaling
- Microscopically: marked follicular hyperkeratosis
Vitamin E Deficiency
- Steatitis may develop in cats fed excess fatty acids or with vitamin E deficincy
- Grossly: firm, yellow or orange nodules in subcutaneous tissue
- Microscopically: nodular to diffuse granulomatous panniculitis, macrophages and giant cells, oedema, fat necrosis, neutrophils and ceroid pigment