Why Do Dogs Eat Grass? Reasons & Prevention Tips

Have you ever caught your dog eating grass? There is a common belief that dogs do this to relieve a sickly stomach, and some pet parents may panic at the sight of their pup chewing on grass. 

But, what are the actual reasons behind this unusual behavior? 

Is Grass Good for Dogs?

When it comes to the question of whether grass is good for dogs, the answer is a bit nuanced. 

Eating grass is a relatively common behavior in dogs, but what does it mean, and is it something to be concerned about?

Grass eating is considered a form of pica in dogs. Pica is the term used to describe the behavior of eating non-food items, and it can be seen in both humans and animals. While pica in humans often involves the consumption of things like dirt or chalk, in dogs, grass is a more typical target.

So, why do dogs engage in this behavior? Well, there are several theories, but no definitive answer. Some experts suggest that dogs might eat grass to help them induce vomiting if they’re feeling unwell, while others believe it could be a way to alleviate gastrointestinal discomfort. However, many dogs eat grass without showing any signs of illness, leading to the conclusion that it might simply be a natural behavior with no specific purpose.

When it comes to nutrient benefits, grass doesn’t offer much for dogs. While grass does provide some fiber, their digestive systems are not designed to break down the cellulose found in plants efficiently, so they don’t gain significant nutritional value from it. However, this doesn’t mean that eating grass is harmful. 

7 Reasons Dogs Eat Grass

Dogs eat grass for a variety of reasons, and while it’s a common behavior, it doesn’t necessarily mean there’s something wrong with your pup. Here’s a closer look at the potential reasons behind this habit:

1. Boredom

Some dogs eat grass simply because they’re bored. If a dog doesn’t have enough mental or physical stimulation, they might turn to eating grass as a way to pass the time. Ensuring your dog has plenty of exercise, playtime, and mental enrichment can help reduce grass-eating caused by boredom.

2. Nutrient Deficiency

There’s a theory that dogs may eat grass to compensate for a nutrient deficiency, particularly a lack of fiber in their diet. To help satisfy their fiber needs and support overall digestive health, consider adding dog-safe vegetables like carrots, cooked pumpkin, blueberries, or chopped cucumbers to their meals. However, it’s essential to remember that not all human foods are safe for dogs. Be sure to avoid foods that could be harmful to your pet.

Dr. Liza Cahn, DVM, adds, “Additionally, to be sure that your dog is eating a complete and balanced diet that provides all the nutrients, vitamins, and minerals that they need, look for brands of dog food that are WSAVA-compliant or AAFCO-certified.”

3. They Like the Taste

Some dogs simply enjoy the taste of grass, especially when it’s fresh and lush. For these dogs, munching on grass may be as enjoyable as any other treat.

4. Instinct

Dogs are omnivores by nature, and their wild ancestors often consumed plants, including wild fruits, vegetables, and grasses, alongside their prey. While modern dogs’ digestive systems have evolved since domestication, the instinct to eat grass may still persist as a natural behavior.

5. Illness

There is some debate about whether dogs eat grass to self-medicate when they’re feeling unwell or if they have a gut imbalance. While some dogs may eat grass and then vomit, there is little scientific evidence to support the idea that dogs eat grass specifically to induce vomiting or alleviate an upset stomach. If your dog frequently eats grass and shows other signs of illness, it’s important to consult your veterinarian.

6. Curiosity

Puppies, in particular, may eat more grass as part of their natural curiosity. As they explore the world around them, puppies often use their mouths to investigate new textures and tastes, including grass. This behavior tends to decrease as they grow older and become more familiar with their environment.

7. Anxiety

It’s possible that some dogs eat grass as a coping mechanism for anxiety or stress. Just as some dogs may chew on objects or engage in other repetitive behaviors when anxious, grass-eating could be another way for them to deal with their emotions. If you suspect that your dog’s grass-eating is linked to anxiety, consider speaking with your veterinarian. They may recommend calming aids or behavioral strategies to help your dog feel more secure.

Should I Let My Dog Eat Grass?

In general, it is usually safe for dogs to eat a bit of grass here and there. Many dogs enjoy nibbling on grass, and for the most part, this behavior doesn’t pose any serious risks. However, as a responsible pet owner, it’s important to be aware of certain risks associated with grass eating that could potentially harm your dog.

Dangers of Dogs Eating Grass

While grass eating is typically harmless, there are some potential dangers that pet parents should be mindful of:

Consuming Pesticides or Herbicides

If your lawn is treated with pesticides, herbicides, or other chemicals, your dog could become very sick if they ingest grass that has been sprayed. These chemicals can be toxic and may lead to serious health issues. If you suspect your dog has eaten grass treated with harmful substances, seek veterinary attention immediately.

Grass Contaminated with Parasites

Grass can sometimes harbor parasites like hookworms, roundworms, and other intestinal worms. If your dog eats contaminated grass, they could ingest these parasites, leading to potential infestations. Ensuring your dog is on a regular flea, worm, and tick prevention treatment is essential to protect them—and your home—from these threats.

Grass Awns and Seeds (Foxtails)

Grass awns, such as foxtails, can be particularly dangerous. These sharp seeds can embed themselves in your dog’s mouth, nose, or skin, leading to infections or more serious complications if they migrate deeper into the body. Always inspect your dog after they’ve been in areas with long grasses, and remove any visible awns promptly.

Intestinal Blockage

Although rare, excessive consumption of grass could potentially lead to an intestinal blockage, especially if your dog is eating large quantities of it. This is more likely to happen if your dog eats long, unchewed grass blades, which can form a mass in the stomach or intestines. If your dog shows signs of distress, such as vomiting, lethargy, or abdominal pain, contact your veterinarian right away.

Ingestion of Harmful Objects

Dogs may inadvertently ingest other harmful objects hidden in the grass, such as small stones, sticks, or trash, which can lead to choking or gastrointestinal issues. Keeping an eye on your dog while they’re grazing can help prevent accidental ingestion of foreign objects.

Gastrointestinal Upset

Eating anything new or unusual has the potential to cause GI upset like vomiting or diarrhea in your dog. If you notice your dog frequently eating grass and then vomiting, you may want to consult with your vet and discourage the behavior. 

When to Worry About Dogs Eating Grass?

Dogs can sometimes eat grass to self-treat an illness. You should get your dog checked out by their vet if:

• They’re eating grass but not also eating their normal food 
• Eating grass and doesn’t seem themselves/appear unwell
• Your dog’s eating grass frantically or excessively
• Your dog is eating grass, and then throwing up repeatedly
• They’re eating grass but also have diarrhea or blood in their stool
• They’re eating grass and noticeably licking their lips (a sign of nausea)
• They’re eating grass and have recently lost a lot of weight
• They’ve started eating grass suddenly

How to Stop a Dog From Eating Grass

Grass eating is an instinctive behavior for dogs, and while it can be concerning for pet parents, it’s important to understand that you may not be able to completely stop it. However, there are several strategies you can implement to help curb this behavior and ensure your dog’s overall well-being.

1. Ensure a Complete and Balanced Diet: One of the first steps in reducing grass eating is to make sure your dog is receiving a complete and balanced diet. Sometimes, dogs may seek out grass if they feel their diet is lacking in certain nutrients. By providing high-quality dog food that meets all their nutritional needs, you can help minimize this behavior.
2. Incorporate the Right Amount of Fiber: A diet that is low in fiber might lead dogs to seek out grass as a natural source of roughage. Ensuring that your dog’s diet includes an appropriate amount of fiber can help support their digestive system and reduce the urge to graze on grass.
3. Increase Exercise and Physical Activity: Dogs that are under-exercised or have excess energy might turn to grass eating as a way to entertain themselves or release pent-up energy. Providing plenty of exercise through regular walks, playtime, and other physical activities can help keep your dog content and less likely to eat grass out of boredom.
4. Provide Mental Stimulation: Mental stimulation is just as important as physical exercise. Engaging your dog with training sessions, interactive toys, and brain games can help keep their mind occupied and reduce the likelihood of them turning to grass as a way to alleviate boredom or stress.
5. Redirect to Chew Toys or Safe Activities: When you notice your dog starting to munch on grass, try to redirect their attention to a chew toy or another safe activity. Reward your dog when they choose the alternative, reinforcing positive behavior and helping them learn to avoid grass in favor of other activities.
6. Consult Your Vet About Calming Aids: If you suspect that anxiety is driving your dog’s grass eating, it’s a good idea to speak with your veterinarian. They can recommend strategies to help manage your dog’s anxiety, which may, in turn, reduce their need to eat grass as a coping mechanism.
7. Limit Access to Grass: Another practical approach is to limit your dog’s free access to grass. This can be done by keeping them on a leash during walks. Plus, you can supervise them closely when they’re in the backyard.

While it may not be possible to eliminate grass eating entirely, these strategies can help curb the behavior and ensure your dog stays healthy and happy. By addressing potential dietary, physical, and emotional needs, you can reduce your dog’s reliance on grass as a form of stimulation or comfort.

Final Thoughts on Why Do Dogs Eat Grass

In summary, while grass doesn’t provide nutritional benefits to dogs, the occasional nibble is usually harmless. And can be considered a normal part of canine behavior. In most cases, pet owners don’t need to be concerned if their dogs are eating a little bit of grass. It’s generally considered safe as long as the grass isn’t treated with pesticides, herbicides, or other harmful chemicals. 

However, if you notice your dog eating large quantities of grass or showing signs of illness afterward, it might be worth consulting with your veterinarian to rule out any underlying health issues.

Sources

“Why Does My Dog Eat Grass?” Blue Cross, May 10. 2015 https://www.bluecross.org.uk/pet-advice/why-does-my-dog-eat-grass

Author Zachary, Jessika “Why Does My Dog Eat Grass?” American Kennel Club, Oct 30. 2020 https://www.akc.org/expert-advice/health/why-does-my-dog-eat-grass/

Author Brownie, Cecil F “Houseplants and Ornamentals” MSD Vet Manual, Aug. 2015 https://www.msdvetmanual.com/toxicology/poisonous-plants/houseplants-and-ornamentals#v4711776