Why Do Dogs and Cats Eat Grass?

Do cats and dogs eat grass?

Eating grass is a normal behavior for dogs and cats, but it's vital to ensure they stay away from grass that's been treated with pesticides, herbicides, or fertilizers.

According to Dr. Benjamin L. Hart, dogs and cats have an ancestral history of eating plants. Plant remains have been found in 2% - 74% of scats and stomach content samples of wild canids and fields. This may point to a biological purpose for plant eating. One theory is that dogs and cats eat plants to purge themselves of intestinal parasites. This could explain why younger dogs that are most susceptible to parasites tend to eat grass more often than older dogs.