Ringworm (also called dermatophytosis) is a contagious fungal disease that affects the keratin of a dog’s hair, skin and nails. Keratin is a tough, fibrous protein that forms the key building material ...

Question: I was watching the evening news on television a few days ago and someone from the Humane Society was talking about crusty circular round lesions on a dog being ringworm. That is exactly what ...