Montana Fish, Wildlife and Parks is responding to a pneumonia outbreak in the Upper Yellowstone bighorn sheep herd near Gardiner. In the past two weeks, State wildlife staff members have collected ten dead bighorn sheep – a mix of rams, lambs, and one adult ewe. The dead bighorn sheep have been brought to the state wildlife lab in Bozeman where all were determined to have died due to pneumonia. Officials say bighorn sheep in the Gardiner area have experienced a small number of pneumonia cases each of the last few years, but not to this extent. FWP biologists will continue to intensely monitor this situation and are encouraging the public to keep their distance from the Gardiner bighorn sheep.