Definition: Cacanthrax is a type of bacteria that causes an infection in dogs and cats. It primarily affects puppies, but can also occur to adult animals. The bacteria are small and round, typically about 1-2 mm long. They are often found on fur or skin around the eyes, ears, nose, and mouth. Symptoms may include itching, scaling of the skin, fever, and coughing. Treatment usually includes antibiotics, which can be given intramuscularly or orally.