Nearly 80% of dog owners report their dogs eat grass. Here’s what veterinarians say about this puzzling habit.
The Theories
Contrary to popular belief, most dogs who eat grass aren’t sick beforehand — and most don’t vomit afterward. A 2008 study found that only 22% of grass-eating dogs vomited. The behavior appears to be a normal canine instinct inherited from wild ancestors who consumed plant matter through the stomach contents of prey.
When to Worry
If grass eating becomes obsessive, increases suddenly, or is always followed by vomiting, see your vet. Also ensure the grass hasn’t been treated with pesticides or fertilizers — those chemicals are far more dangerous than the grass itself.