Is Eating Grass Bad For Dogs? Vet-Backed Reasons and What To Watch For

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Is your dog constantly nibbling on grass? You’re not alone. While it might seem strange, grass-eating is a very common behaviour in dogs.

The good news? It’s usually not harmful. But in some cases, especially if it’s excessive or causes vomiting, it can point to an underlying issue.

In this article, I’ll explain why dogs eat grass, when you should be concerned, and how to reduce or redirect the habit.

Why Do Dogs Eat Grass? 5 Possible Reasons

1. It’s a Type of Pica (Eating Non-Food Items)

Dogs sometimes eat things that aren’t food, like rocks, socks, or even grass. This behaviour is known as Pica, and it can be triggered by boredom or, in some cases, a nutritional deficiency.

Some dogs even eat poop, which can also fall under this behaviour. Learn more about why dogs eat poop and how to stop it.

That said, most experts agree that grass-eating is a normal form of Pica and usually nothing to worry about, especially if your dog is otherwise healthy and happy.

2. They’re Bored or Seeking Attention

Some dogs munch on grass to pass the time or to get a reaction from you. If you always tell them to stop, they may keep doing it just for the attention. Puppies and high-energy dogs especially do this when they need more stimulation.

3. They Might Be Craving Nutrients or Fibre

Even dogs on a balanced diet may be instinctively drawn to grass. It contains fibre, chlorophyll, potassium, and digestive enzymes, which can support gut health and appeal to dogs looking to supplement their diet naturally.

4. They’re Trying to Relieve an Upset Stomach

Some dogs eat grass to make themselves throw up, especially if something upset their stomach. Dogs that gulp grass and vomit soon after might be trying to feel better.

But this isn’t as common as many think; most dogs don’t actually vomit after eating grass, and only a small percentage show signs of illness beforehand, according to VCA Animal Hospitals.

5. They Just Like The Taste

For many dogs, grass is simply tasty, especially fresh, tender spring grass. The texture and moisture can be appealing, and they might treat it like a crunchy snack.

Is Eating Grass Bad For Dogs?

While grass-eating is usually harmless, here are a few things to watch for:

1. Grass Treated With Chemicals

Chemicals like herbicides or fertilizers can be toxic, even if your dog only walks through treated areas and licks their paws afterward.

Always avoid letting your dog eat grass in areas where lawn care products may have been used, especially if there’s no clear signage.

2. Toxic Plants Mixed In

If your dog is munching on grass near gardens or landscaping, they could accidentally eat a toxic plant. Many common plants like lilies, azaleas, and tulips can be harmful to dogs.

Check the ASPCA’s list of toxic and non-toxic plants if you’re unsure what’s growing in your yard.

3. Sudden or Excessive Grass Eating

If your dog suddenly starts eating a lot more grass than usual, or does it obsessively, it could be a sign of an underlying issue, like nausea or digestive discomfort.

If the behaviour seems out of the ordinary or is paired with frequent vomiting, it’s best to check in with your vet.

When To Worry About Grass Eating

Grass eating isn’t usually a problem, but there are times when it could signal something more serious. Here’s when to pay closer attention:

1. It’s Sudden and Excessive: If your dog rarely eats grass but suddenly starts doing it more often or in large amounts, it could be a sign of stress, nausea, or an underlying health issue.
2. Your Dog Throws Up Every Time: If grass eating is always followed by vomiting, your dog might be using it as a way to self-soothe. This could be a sign of digestive upset or something more serious that needs a vet’s attention.
3. There Are Other Symptoms: Watch for changes like loss of appetite, low energy, diarrhea, or signs of discomfort. Combined with grass eating, these symptoms may point to illness or dietary issues.
4. It’s Becoming a Daily Habit: If your dog goes for grass constantly, even without other symptoms, it’s a good idea to bring it up at your next vet visit to rule out any issues.

7 Simple Tips To Reduce Grass Eating In Dogs

If your dog’s grass-eating habit is becoming frequent or bothersome, here are some easy ways to reduce or redirect the behaviour:

1. Add More Fibre to Their Diet: Some dogs eat grass to make up for a lack of fibre. Try switching to high-fibre dog food or adding fibre-rich foods like canned pumpkin or plain cooked vegetables.
2. Offer Safe Greens Indoors: Try growing wheat grass indoors as a chemical-free option for grazing. It’s often sold for cats, but plain, organic wheat grass is safe for dogs too. This indoor wheat grass growing kit is a simple way to get started. (Always check ingredients and avoid products with additives and catnip.)
3. Offer Dog-Safe Herbs to Nibble On: Grow a few safe herbs like burdock, milk thistle, lemon balm, peppermint, or astragalus. They satisfy the urge to graze and offer added health benefits.
4. Provide Chew Toys or Puzzle Feeders: Boredom is a common cause of grass-eating. Chew toys, treat puzzles, or slow feeders can keep your dog mentally engaged.
5. Increase Daily Exercise and Play: Make sure your dog is getting enough physical and mental stimulation. Extra walks, training games, or fetch sessions can help reduce boredom. Need ideas? Check out these easy ways to mentally stimulate your dog without expensive toys or long hours.
6. Supervise Outdoor Time: Watch your dog when they’re outside. If they go for grass, redirect them with a toy, treat, or simple command.
7. Check With Your Vet About Diet: If the habit continues, ask your vet whether your dog’s diet is complete. Sometimes a minor adjustment or supplement can make a big difference.

FAQs

1. Why Does My Dog Eat Grass And Throw Up?

Some dogs eat grass to make themselves vomit, especially if they’re feeling nauseous. But not all dogs throw up after eating grass, and it’s not always a sign of illness. If vomiting happens often, talk to your vet.

2. Should I Let My Dog Eat Grass Every Day?

It’s usually okay in moderation, as long as the grass isn’t treated with chemicals and your dog isn’t showing other symptoms. But daily or obsessive grass-eating could mean something else is going on.

3. Can Grass-Eating Mean My Dog Is Sick?

It’s possible, especially if it’s a new behaviour or paired with other signs like vomiting, diarrhea, or loss of appetite. In those cases, it’s best to check in with your vet.

4. Can Grass-Eating Mean My Dog Is Missing Nutrients?

Maybe. Some dogs might eat grass to get more fibre or minerals, but there’s no clear proof. If your dog is eating a balanced diet, it’s not likely due to a deficiency.

Final Thoughts

So, is eating grass bad for dogs? Usually not. It’s a common behaviour and often harmless, especially if your dog is otherwise healthy and happy.

Does your dog eat grass often? Have you noticed any patterns or found something that helps? Share your experience in the comments, I’d love to hear what’s worked for you.