Can disease-detecting dogs help save South Dakota's bighorn sheep?

In summer 2021, Badlands National Park was home to a healthy and growing population of Rocky Mountain bighorn sheep, with approximately 300 total among the three herds. Then in August, Paul Roghair, lead biological science technician for the park, came across a dead sheep. In September, he found a dead ram. Roghair had a sinking feeling about what might be afoot.