I've never seen one but I've heard enough reports over the years to think that it's certainly possible. There are some pretty remote areas where a secretive animal (like a cougar) could hide in. I found a chewed up white tail that was buried in the snow a few years ago in Sullivan County. I wondered if it could have been a cougar. Could it have been coyotes or a bear? Do you know where in Sullivan County this cougar was killed?