If you've ever caught your dog munching on grass during a walk, you're not alone. It's one of the most common questions dog owners ask, and in most cases, it's perfectly normal.

But why do dogs do it?

The truth is, there's no single answer. Dogs may eat grass for several different reasons, and it isn't always a sign that something is wrong.

Curiosity or habit

Sometimes, dogs simply enjoy chewing on grass! Puppies, in particular, explore the world with their mouths, and many adult dogs continue the habit throughout their lives.

If your dog has a nibble every now and then before carrying on with their walk, it's usually nothing to worry about.

They like the taste or texture

Just as some dogs prefer certain toys or treats, others seem to enjoy the taste or texture of fresh grass. Many owners notice their dogs are more likely to eat grass during spring and summer when it's young and tender.

Upset stomach

You've probably heard that dogs eat grass to make themselves sick.

While some dogs do vomit after eating grass, most don't. It's difficult to know whether they were already feeling unwell before they started eating it, or whether the grass caused them to be sick.

Occasionally eating grass isn't usually a cause for concern, but if your dog is repeatedly eating large amounts of grass, vomiting frequently or seems unwell, it's worth speaking to your vet.

Looking for extra fibre?

Some experts believe dogs may occasionally eat grass if they're looking for more fibre in their diet, although there's no clear evidence that this is the reason.

Feeding a complete, balanced diet helps ensure your dog is getting the nutrients they need.

Should I stop my dog eating grass?

For most healthy dogs, there's no need to stop them from eating the odd mouthful.

The bigger concern is where they're eating it. Avoid letting your dog graze on grass that may have been treated with pesticides or weed killers, or areas where other animals may have left waste.

As always, supervise your dog while they're out and about.

When should I be concerned?

It's a good idea to contact your vet if your dog:

• Suddenly starts eating large amounts of grass.
• Is repeatedly sick after eating grass.
• Seems lethargic or unwell.
• Has diarrhoea or other ongoing digestive problems.
• Stops eating their normal food.

While eating grass is usually harmless, changes in your dog's behaviour are always worth paying attention to.

Frequently asked questions

Is it normal for dogs to eat grass?

Yes. Many dogs eat grass from time to time, and in most cases it's considered normal behaviour.

Does eating grass mean my dog is missing nutrients?

Not necessarily. There isn't enough evidence to say that eating grass is a sign of a nutritional deficiency.

Why does my dog eat grass then throw up?

Some dogs vomit after eating grass, but many don't. If it happens occasionally and your dog is otherwise well, it's not usually a cause for concern. If it happens regularly or your dog seems unwell, contact your vet.

Can puppies eat grass?

Yes. Puppies often chew grass as they explore their surroundings. Just make sure the area is safe and free from chemicals or anything that could make them ill.