Mckinnley & Cinder Stand off

We recently acquired a new pet. Late one night a little black cat was thrown out of a car in front of our home. She was terrified, and hid in our garage for a day or so. We fed her and fell in love with her and decided to adopt her. She was to young to have her spaid so we had to keep her for a few weeks until she was old enough. She is coal black so we named her Cinder. Our little dog Mckinnley is so jealous of her. Cinder torments Mckinnley to death.