Laelaps was a god with the ability to catch whatever it hunted. She was created by Artemis, goddess of the hunt.
Laelaps was a female dog who never failed to catch what she was hunting. He was a gift from Artemis to Europa. The hound was passed down to King Minos. Procris's husband, Cephalus, decided to use the hound to hunt the Teumessian fox, a fox that could never be caught. This created a paradox: a dog who always caught his prey and a fox that could never be caught. The chase went on until Zeus, perplexed by their contradictory fates, turned both to stone and cast them into the stars as the constellations Canis Major (Laelaps) and Canis Minor (the Teumessian fox).