Attack Cat strikes again, twice!

My folks used to raise Siamese cats. When they were outside they were always on an 1/8" nylon rope leash. One day the neighbors doby walked through our yard while our momma cat was out with her kittens, so momma backed the kittens against the door into the house and waited. When the doby put one paw inside the leash circle the cat hit the end of the rope hard enough to pull it in two then proceeded to nearly kill the dog! The leash was not chewed and the cat only weighed about 7 pounds! Do NOT mess with momma!