This section is from the book "Sporting Dogs. Their Points And Management In Health, And Disease", by Frank Townend Barton. Also available from Amazon: Sporting Dogs; Their Points and Management in Health and Disease.
Although now and then affected with ringworm, the dog does not suffer from the skin disease anything like so commonly as cattle.
The chief variety seen upon the dog is that induced by the vegetable parasite, Tricophyton tonsurans, which assumes a circular, or shield-like form. Honeycomb ringworm is another variety. The patch is about an inch long as a rule, scaly, and shows the hairs broken across, giving it a stubbly appearance. It is easily recognised.
Ringworm can be readily transferred from one dog to another, or to animals of different species, and the converse.
Paint the bare patch or patches with iodine liniment; groom well and feed well. Keep dog away from others until cured.