Wolf-dog hybrids are bred by crossing domestic dogs with wolves, sometimes just a few generations back. They carry physical traits and instincts that set them far apart from standard breeds. These ...

That isn’t usually supposed to happen.

Domestic dogs, wolves and coyotes can also breed with each other. Horses and donkeys interbreed. A mule is a cross between a female horse (called a mare) and a male donkey (a jack). A hinny results ...