Why Do Dogs Eat Grass?

Transcript

Your dog just ate half the lawn, and you're thinking: poor thing must feel sick. But when UC Davis vets surveyed fifteen hundred dog owners, fewer than one dog in ten looked ill first, and only one in five threw up after. Most grass-eaters are perfectly healthy, and young dogs do it most. So the answer is older than your dog.

Wolves eat plants too, and wild canines live with gut worms. The best theory: grass barely digests, so it pushes through, wrapping around the worms and sweeping them out. That lawn snack isn't medicine for an upset stomach. Most likely, it's a broom, handed down from wolves.