My Cat Has A Rash And Is Losing Hair. The main agent is a. This fungal infection is highly contagious and frequently occurs among kittens or cats living in groups.
They cause itchy, red, skin rashes, especially around the lower back, neck and head. Well, it is very rare but diabetes in cats will attack their immune system which can lead to hair loss. Ringworm is one of the most common causes for hair loss in cats.