One of those mysterious dog behaviors that pet owners wonder about is eating grass. Lots of dogs do it… but why? Are they sick? Hungry? Bored? And more importantly, is it a good thing or could it be harmful? Some experts think that eating grass is an inherited, instinctual behavior. In the wild, canines hunted and ate animals that fed on grass – and they ate the entire animal, even the grass in their prey’s stomach.

Another theory is that dogs will eat indigestible substances when they suffer from poor nutrition or when they are feeling extremely hungry. Some believe that dogs may eat grass when they have intestinal worms or because their bodies need more fiber or roughage in their diet. And lastly, others believe that dogs eat grass when they are feeling ill and want to regurgitate something