We were sitting on the deck/roof and she snagged one right on the edge of the roof. Like out of thin air. She put the thing out of its misery. Another squirrel jumped up over the ledge and attacked her. It put up the good fight, fur literally flying. The kamikaze squirrel also died. I don't know if they were grey squirrels, but they were surely dead squirrels.Impressive. Most cats can't catch greys.