Fisher Cats aren't cats at all, they are musteliuds (weasels). They can weigh up to 15lbs. Fisher Cats are voracious hunters and a real threat to farm animals that aren't kept in well-built shelters. They're mostly nocturnal, so they're unlikely to be seen around the farm. When I shine a flashlight up into the trees at night, it's entirely possible that the glowing eyes that I see are those of a Fisher Cat, or more likely, a Raccoon.