Sore mouth disease suspected in Yellowstone bighorn sheep
So far, only breeding age rams in the park have been observed with lesions. This is likely a result of frequent contact with each other and possibly infected ewes during the breeding season.
The disease is difficult to control in bighorn sheep. In most situations, control efforts are not warranted since the disease is typically self-limiting as animals build up protective antibodies.
Park biologists will continue to monitor the infected animals.