Prevention Prevention really is important and should begin with the isolation of new animals to the farm. Thirty days should be sufficient, but giving a whole body treatment with chlorohexadine before release is a great idea. There are quite a few things to keep in mind to ensure that ringworm is not a continuous problem within your flock. Equipment can actually remain a source of infection for up to four years, so it is very important to keep all equipment clean and all infected animals away from uninfected animals. It is also important to remember that there are certain factors that make your sheep more susceptible to the ringworm infection.
Young animals seem to be more susceptible than older animals.
Poor nutrition will increase the likelihood of infection. If an animal has not had ringworm they are more likely to be susceptible to it. Animals kept in the same pen with infected individuals are more likely to catch this fungus. If your sheep is kept in dark, damp, warm, and poorly ventilated areas your animal is more likely to become infected. Sheep in contact with cattle are more likely to get this disease.