Why does my dog eat grass?
Physical Reasons
The primary reason that dogs eat grass is that they require roughage in their diets, just like humans do. Grass can be a good, and readily accessible source of fiber.
As with people, a lack of roughage or fiber in the diet can hinder a dog's ability to digest food effectively and to pass stool. Eating grass may actually be a way for your dog to try and help their body function more smoothly.
That said, there may be something more serious going on if your dog is showing signs of stomach upset in addition to eating grass. Make an appointment to see your vet if your dog appears to have an upset stomach, so that they can rule out any medical issues, or provide treatment.
Psychological Reasons
Boredom or anxiety can be another reason that dogs eat grass.
Most dogs have no problem keeping themselves occupied when outside, but others can get bored if left alone, and may pass the time by nibbling on grass.
Often, anxious dogs will eat grass as a sort of mindless comfort, much like people who chew their finger nails. Pet owners may notice that their dogs eat more grass when they're feeling bored, anxious or lonely.
There are several possible solutions if you think your dog is eating grass for psychological reasons.
If your dog suffers from separation anxiety, an old t-shirt or blanket with your familiar scent may provide comfort to your pet when you're not around.
For bored dogs, a puzzle toy could provide mental stimulation. If your dog is high energy, more frequent walks and strenuous play sessions may be helpful. And for dogs that enjoy socializing with other dogs, doggie daycare or visits to the dog park can be a good idea.
Is eating grass safe for dogs?
As long as your dog is on consistent parasite prevention, and isn't eating grass excessively or showing signs of stomach upset, eating grass is nothing to worry about and is perfectly safe.
Be sure that there are no fertilizers, pesticides, or herbicides used on the grass that your dog eats, as this can be dangerous.