December 2017 A very common skin disease affecting dogs and cats is ringworm. It sounds like this would be a parasite, right? Wrong! Actually, it is not a worm at all, as its name might suggest. It is a fungal infection which lives on the outer layer of the hair, skin and nails. It is found in hot, humid climates, occurring most often in the fall and winter months. Ringworm is characterized by itchy, bald patches which are crusty, scaly and have a moldy odor. Pimples and bump