Dogling

A dogling is an aggressive breed that mixes an earth canine with a martian hunter-killer. The result is a creature that does not follow commands and is too lazy to chase anyone for too long. The Doglings are amazing at guarding an area against intruders... and owners... and anyone with a pulse... and anyone that moves. In short, the doglings have been outlawed in most places because the damn things are uncontrollable and are impossible to put down via normal means.