CAT BEWARE GUARD TORTOISE ON PATROL.. My cat Kitty Not allowed in large garden by our tortoise Billy (cat having annoyed tortoise over 18 months ago as a kitten..) Billy Relentlessly chases, hunts and head butts Kitty whenever outside in garden sun, sometimes for up to an hour (!) Until cat is evicted from garden back through cat flap. As soon as going back out again... Billy Tortoise resumes Attack..! Hunting and head beak butting.. :)