There are several types of skin cancer that can affect dogs including malignant melanoma, mast cell tumors, squamous carcinoma, histiocytic cell tumors, and fibrosarcoma. Malignant melanoma and mast cell tumors are two of the most common types of skin cancer in dogs. Owners can find more information about canine skin cancers by visiting https://greatvet.com/clinic/best-vets-louisville-metro.