Additionally, tests for heartworms are not very reliable in ferrets. Ringworm This skin infection is caused by dermatophytes, or a type of fungus. The symptoms are usually one or several round, itchy patches of hair loss. A reddish ring commonly appears. It can also cause scaling of footpads, or toenail thickening.
Ringworm is highly contagious to humans and other animals.
Treatments is with anti-fungal creams or ingestible tablets. Treatments typically last six weeks. Scabies is caused by a mite, somewhat similar to mange. Treatment is ivermectin shots every two weeks for 2-6 sessions at a veterinarian. The ferret may also need cortisone to help with swelling and itching.