Why Does My Dog Eat Grass When His Stomach Is Upset? 6 Important Reasons

Many dog owners have asked ”Why does my dog eat grass when his stomach is upset,” and there are many reasons why they might do this. Learn about those reasons and how to prevent your dogs from overeating the lawn.

Scientific Research Insights

Self-Medication Hypothesis:

This theory suggests that dogs may instinctively eat grass to help themselves vomit and relieve digestive discomfort. However, scientific evidence supporting this idea is limited.

A study conducted by Sueda et al. in 2008 (“Why do dogs eat grass?”) examined the grass-eating behavior in dogs and suggested that dogs might consume grass to help themselves vomit, but more research is needed to confirm this.

Dietary Fiber and Nutrient Intake:

Another theory proposes that dogs may eat grass to increase their dietary fiber intake or to obtain certain nutrients that are lacking in their regular diet.

A study by Horowitz (2009) in the journal “Applied Animal Behaviour Science” explored various reasons for grass eating in dogs, including the potential role of dietary fiber, though it didn’t provide conclusive evidence.

Reasons Why Does my dog eat grass when his stomach is upset

There are a few reasons “why my dog eats grass when his stomach is upset” which are mentioned below.

  • Get rid of eating don’t like
  • Dogs may be sick
  • Dogs are bored
  • Dogs need nutrition food
  • To self-soothe 
  • Makes himself vomit to get rid of something harmful in the stomach or intestines 

1. Get rid of eating don’t like

The most common reason is that the dog is trying to rid itself of something that it doesn’t want to eat. If the dog’s stomach is empty and it can’t vomit, it will try to do what it can to get rid of the object or food that it isn’t happy with.

2. Dogs may be sick

Dos May Be Sick
Dog May Be Sick

Another reason why dogs might eat grass is that they are sick. When a dog is sick, it might not be able to digest food properly. This can lead to them eating grass to get the nutrients that they need.

3. Dogs are bored

In some cases, dogs might eat grass because they are bored. They might see grass as something new and interesting, and they want to try it out. Bored dogs might also eat other things, like rocks or sticks, in an attempt to entertain themselves.

4. Dogs need nutrition food

Another possibility is that your dog is craving greens and nutrients that he isn’t getting from his regular diet. If he’s eating a lot of processed food, for example, he might be lacking in vitamins and minerals. Eating grass could be his way of trying to correct that imbalance.

 5. To self soothe 

To self-soothe, the dog may eat grass because grass can help to cleanse the digestive system and can remove any build-up of toxins. This can be especially helpful if your dog has eaten something that he shouldn’t have. 

6. Makes himself vomit to get rid of something Harmful

Dogs vomit for many of the same reasons that humans do. They may have eaten something that disagreed with them, or they may be suffering from an infection or illness. 

Some dogs also vomit as a way to get rid of something harmful in the stomach or intestines. This is known as the vomiting reflex. The dog’s body will automatically try to get rid of anything that it perceives as being harmful. 

Read Also: When Does My Dog Eat Grass He’s Sick

Solutions For The problem why does my dog eat grass when his stomach is upset”?

One solution is to make sure your dog has enough food to keep his stomach happy and working properly.

Another solution is to take your dog on walks so that he has something fun to do and doesn’t feel so lonely or stressed out.

Should I let my dog eat grass when he has an upset stomach?

Most vets agree that eating grass probably helps soothe a dog’s upset stomach. An “upset stomach” usually means that stomach acids are building up. In most cases, there’s no need to worry if your dog eats grass occasionally. Just make sure that he has access to plenty of other food and toys so he doesn’t get bored, and check with your vet if you have any concerns about his health. 

Read Also: Why Does My Dog Eat Grass And Plants

Should I stop my dog from eating grass

”No” Because eating grass is a normal behavior for dogs. It’s unlikely that they’ll get much nutrition from it, but for an otherwise healthy dog that is regularly wormed, eating grass every now and again is unlikely to be something to worry about.

when you need to be concerned about “why does my dog eat grass when his stomach is upset”?

Talk To Your Veterinarian
Talk To Your Veterinarian

If your dog is eating grass and vomiting, it could be a sign of an underlying medical condition. But if your dog eats grass regularly, it’s worth checking into the reason behind it, talk to your veterinarian. They can help you determine if there is a medical reason for it or if your dog just needs more attention and exercise. 


If your dog eats grass randomly so you don’t need to worry about this because grass has a good source of nutrition, contains a high level of fiber, and rich source of vitamins which is helpful for dogs to be fit and healthy.

Eating grass can also help to settle your dog’s stomach quickly so that he doesn’t feel sick longer. If the dogs feel their stomach is upset and the dog eats grass will make them feel better and relaxed.

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