Grass consumption is a normal dog behavior however not all dogs actually show this behavior. It seems to be still ingrained in their behavior considering that they were once wild animals, and would eat every part of their quarry. This prey would regularly be a plant consuming animal, so they could quite possibly have developed a taste for it because of this. The grass and the plants within the intestines of the herbivores would have been consumed by the dog. And it's for this reason why many experts believe is why dogs still munch on grass.
For this reason some city dwellers provide their dogs with grass supplements. When you let the dog poop in the yard he will often munch on a mouthful of grass. To the dog the lawn is one big salad plate.
Dogs eat almost anything. To a dog the spoiled food in the garbage cans, the animal poop, the unearthed dead animals are yummy delicacies. No wonder these animals suffer from stomach upsets from time to time. A dog eats grass to induce vomiting. This is their way of getting rid of what's not agreeing with their digestive systems.
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