This is only one of the many versions of why dogs always chase cats.

Once long ago, Dog was married to Cat. They were happy together, but every night when Dog came home from work, Cat said she was too sick to make him dinner. Dog was patient with this talk for a while, but he soon got mighty tired of fixing dinner for them both after a hard day's work. After all, Cat just stayed home all day long.

One day, Dog told Cat he was going to work, but instead he hid in the cupboard and watched Cat to see if she really was sick. As soon as Cat thought Dog had left, she started playing games with Kitten. They laughed and ran about. Cat wasn't the least bit sick.

Dog jumped out of the cupboard. When Cat saw him, she stuck a marble in her cheek and told Dog she had a toothache. Dog got so mad at her he started chasing her around and around the house.

Dogs have been chasing Cats ever since.

This story was retold by S. E. Schlosser. You can read more of such folktales at Spooky South.