Why Do Dogs Eat Grass? 5 Surprising Reasons Backed by Experts
You’re out walking your dog or watching them in the yard, and suddenly—chomp, chomp—they’re munching on grass like it’s a salad bar. If you’ve ever asked yourself, “Why does my dog eat grass?” you’re not alone. It’s one of the most common questions dog owners have.
While it might look strange, grass-eating is actually very common and usually nothing to worry about. Still, it helps to know why dogs do it, when it’s harmless, and when it could be a sign of something more serious.
Is It Normal for Dogs to Eat Grass?
Yes, grass-eating is a normal behavior in many dogs. In fact, studies show that up to 79 percent of dogs have eaten grass at some point. Most of them are otherwise healthy and show no signs of illness.
Dogs are natural foragers. Even though they are primarily carnivores, they sometimes nibble on plants, including grass, out of instinct, curiosity, or even boredom.
5 Possible Reasons Dogs Eat Grass
1. They Have an Upset Stomach
Some dogs eat grass to help themselves vomit if they’re feeling queasy. However, this isn’t always the case. Only a small percentage of dogs vomit after eating grass, so it’s not a guaranteed link.
2. They’re Seeking Fiber
Dogs may eat grass if their diet is low in fiber. Grass contains natural roughage that can help support digestion. If your dog seems obsessed with eating grass, consider reviewing the fiber content in their food.
3. They’re Bored or Anxious
Just like some people bite their nails, dogs may chew grass as a stress-relief behavior. If your dog is under-stimulated or anxious, they might turn to grass as a way to occupy themselves.
4. They Like the Taste or Texture
Some dogs just enjoy the taste or feel of grass. It might feel satisfying to chew, especially when it’s fresh, wet, or cool.
5. It’s an Instinctual Behavior
Wild canines, including wolves and coyotes, are known to eat plants. It’s possible your dog’s behavior is inherited from their ancestors who consumed entire animals—stomach contents and all—including partially digested vegetation.
When to Worry About Grass Eating
Grass-eating is usually not a cause for concern, but there are a few red flags to watch for:
Vomiting frequently after eating grass
Eating grass obsessively or daily
Showing signs of gastrointestinal distress like diarrhea or lack of appetite
Lethargy or sudden behavior changes
If you notice these symptoms, consult your veterinarian. Your dog may be trying to self-soothe due to an underlying health issue.
Is It Safe for Dogs to Eat Grass?
Grass is generally safe in small amounts, but the danger comes from what’s on the grass. Lawns treated with pesticides, herbicides or fertilizers can be toxic to dogs.
Also be cautious in public parks or areas sprayed for bugs, as these chemicals can harm your pet if ingested.
To stay safe, only allow your dog to chew on grass you know is untreated and clean. Or, consider growing a small patch of dog-safe grass indoors or in your yard.
🐾 How to Reduce or Redirect Grass Eating
If your dog is eating too much grass, try these tips:
Increase fiber in their diet with canned pumpkin or fiber-rich dog food
Offer more chew toys or interactive play to reduce boredom
Add leafy greens like spinach or kale (in small amounts) to their meals
Use distraction and training to redirect the behavior during walks
Provide mental stimulation through puzzles and scent games
Final Thoughts
Eating grass might look strange, but for most dogs, it’s a normal and harmless behavior. As long as they aren’t vomiting frequently or showing signs of illness, your dog is likely just following their instincts or satisfying a natural curiosity.
That said, if grass eating becomes excessive or is paired with other symptoms, it’s best to speak with your vet.
Your dog’s quirky behavior is just one more way they’re keeping life interesting.