Why Do Dogs Eat Grass? Unraveling the Mystery

Why Do Dogs Eat Grass? Unraveling the Mystery

A dog eating grass

Published on: August 19, 2023 (Updated on: April 22, 2024)

Dogs have long been known as man's best friend. They are loyal, loving, and always eager to please. But, every so often, many dog owners observe a behavior that seems rather puzzling: their furry companions munching on grass. While it might seem strange for a dog (carnivorous animal) to snack on grass, there are several theories that attempt to explain this behavior.

1. It’s instinctual

Historically, dogs are descendants of wild canines, like wolves and coyotes. These wild ancestors consumed herbivorous prey, which means they ingested a lot of the plant material found in the stomachs of their prey. Over time, this behavior could have evolved as an instinctual dietary supplement. When dogs eat grass, it might be a throwback to their ancestral diet.

2. Dogs eat grass to induce vomit

A common theory among veterinarians and pet experts is that dogs eat grass to induce vomiting. If a dog has eaten something that disagrees with its stomach, it might eat grass as a natural remedy. The long blades of grass can tickle the dog’s throat and stomach lining, leading to vomiting. However, this theory is debated since not all dogs that eat grass vomit afterward.

3. Dietary needs

Dogs are primarily carnivorous, but they have omnivorous tendencies. This means they can benefit from both animal and plant-based foods. Some believe that dogs eat grass to fulfill certain dietary deficiencies, like fiber or minerals. Eating grass might help with digestion, assist in moving food through the intestines, or act as a source of fiber.

4. Dogs might eat grass due to boredom or anxiety

Just like humans, dogs can experience boredom or anxiety. Chewing is a natural behavior for dogs, and in the absence of toys or playtime, they might turn to grass or other objects around them. Eating grass can also be a form of coping mechanism for some dogs to alleviate stress or anxiety.

5. Some dogs eat grass simply because they like It

It’s entirely possible that some dogs just like the taste or texture of grass. Just as humans have varying tastes and preferences, dogs too have their own likes and dislikes. Fresh green grass might just be a pleasant snack for some dogs.

Is it safe for dogs to eat grass?

Generally, eating grass is not harmful to dogs. However, there are a few considerations to keep in mind. Some grass might be treated with pesticides, herbicides, or other chemicals that can be harmful if ingested. If you know your lawn or the park you frequent uses such chemicals, it's essential to prevent your dog from eating the grass.

Moreover, if your dog is eating grass excessively or shows signs of discomfort, vomiting (especially if it’s frequent), or diarrhea, it's a good idea to consult your veterinarian. It could be an indication of an underlying health issue or dietary deficiency that needs to be addressed.


The mystery of why dogs eat grass is one that has multiple potential explanations. From instinctual behavior and dietary needs to simple preference, each dog might have its own reason. Dog owners ought to ensure that their dog's environment is safe and to observe them for any signs of discomfort or illness. If ever in doubt, always consult with a vet to ensure the well-being of your dog.



Michael Akerele