Most dogs eat grass from time to time, but when you see it happen you might be worried that something is wrong because it doesn’t seem natural. After all, you give your dog plenty of food, RIGHT? So is he hungry? Sick? Bored? Will eating grass hurt him?
Eating grass is a common practice for dogs (it has also been observed in wild dogs) and it does not usually cause any problems. (except when they puck in the house). Most veterinarians consider it to be a normal dog behavior.
Studies of dogs that have regular access to grass and other plants found – shows that 79% of those dogs had eaten plants at some time. A survey focused on plant-eating dogs, found that grass was the most commonly eaten plant.grass-dogs
There are several of reasons suggested as to why dogs eat grass.
Some people suggest that dogs turn to eating grass when they don’t feel well and that eating grass is a way to make themselves vomit, resulting in feeling better. But the evidence suggests that most dogs that eat grass aren’t sick before they eat the grass. In fact, less than 10% of dogs seem to be sick before eating grass, according to a survey. In the same survey, of the dogs who ate grass – less than 25% of  vomited after eating it.
Other opinions offered suggest that dogs might be eating grass to improving digestion, treating intestinal worms, or that it fulfills some nutritional need, like the need for more fiber.
All of these reasons may actually have some validity. But, there is also one other possibility … your dog simply just likes the way grass tastes or feels in his mouth. Like you, your dog likes a treat from time to time, and he thinks that grass is the equivalent of an ice cream cone …. you know, a “treat”.