Is it normal for puppies to eat grass?

Yes, casual grass grazing is common in puppies and is usually just exploratory or habitual behaviour rather than a sign of illness. It only needs attention if it becomes frantic, frequent, or is accompanied by vomiting or a change in your puppy's normal behaviour.

Should I stop my puppy eating grass?

There is no need to stop occasional grazing on grass you know has not been treated with chemicals. It is worth interrupting if the lawn has been treated, if pellets or other garden products may be present, or if the behaviour looks obsessive rather than relaxed.

My puppy ate grass and was sick afterwards, is that normal?

It can happen without anything being seriously wrong, but a puppy who was already feeling off is more likely to vomit after eating grass than one who was well beforehand. If it happens repeatedly, or your puppy seems unwell in any other way, speak to your vet rather than assuming the grass was the cause.

What about lungworm from grass?

Lungworm is carried by slugs and snails, which live in the same grass puppies graze on, and it is a genuine risk in the UK. It is worth asking your vet what prevention is appropriate for your puppy and the area you live in, rather than relying on avoiding grass alone.

Why is my puppy eating grass?

Puppies exploring the world mouth-first is normal, and grass is one of the easiest things for them to reach and taste, so grazing on it is rarely a sign of anything wrong. It becomes worth paying attention to only if it is frantic rather than casual, happens alongside vomiting or a change in appetite, or is part of a wider pattern of eating things that are not food at all.

Usually not urgent

This is common and often manageable at home — but see a vet if it persists, gets worse, or comes with other changes.

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Why puppies do it

A puppy investigates almost everything by putting it in their mouth, and grass is abundant, easy to reach, and often genuinely appealing in taste and texture, especially fresh spring growth. For many puppies it is simply one more thing to explore on a walk or in the garden, with no digestive complaint behind it at all, in exactly the same way they might mouth a stick, a leaf, or a stray sock left within reach.

Boredom plays a part too. A puppy left in a garden with little else to do will often find grass, sticks or stones to occupy themselves with, and grazing on grass is one of the more harmless versions of that habit. Puppies also go through a teething phase where chewing on anything textured, grass included, can be a way of relieving sore gums.

When it is a sign of something else

Occasionally a puppy who eats grass then vomits is doing so because they already felt unwell, rather than the grass causing the sickness — cause and effect are commonly assumed the wrong way round. If your puppy seems quiet, off their food, or unwell before or after grazing, treat those as the signs to act on rather than the grass itself.

Eating grass alongside other non-food items — stones, soil, fabric — is worth mentioning to your vet as a pattern, since a puppy who is consistently drawn to eating things that are not food can have an underlying cause worth investigating, from a nutritional gap to a behavioural one.

The real risk: what is on the grass

This matters more than the grass-eating itself. Lawns treated with weedkiller or fertiliser should be avoided for as long as the product instructs, and slug pellets are a genuine poisoning risk if your puppy is grazing where they have been scattered. If you are not sure whether a lawn has been treated, it is safest to keep your puppy off it.

Slugs and snails living in long grass can carry lungworm, which is a real risk to dogs in the UK. This is worth a specific conversation with your vet about prevention, particularly if your puppy grazes regularly in areas where slugs and snails are likely to be present.

Grass seeds are another summer hazard worth knowing about, since they can work into a paw, ear or eye rather than being swallowed — check your puppy over after a walk through longer grass, especially around the paws and ears, if this is somewhere they regularly graze or explore.

What actually helps

If the grazing looks like boredom, giving your puppy something more engaging to do closes that gap — short training sessions, a chew, or a puzzle toy in the garden all compete for the same attention that grass is currently getting. Changing the route of a walk can also help if it is a habit tied to one particular spot, and rotating a couple of toys rather than leaving the same one out all the time keeps the novelty going for longer.

If teething seems to be part of it, offering an appropriate chew toy alongside the grazing gives your puppy something safer to work their gums on, and many puppies naturally shift their attention once they have a better outlet. This does not need to replace supervised time outside — it simply gives them another option.

See your vet if the grass eating is sudden and frantic rather than casual, comes with repeated vomiting or diarrhoea, or if your puppy seems unwell, off their food, or is eating other non-food items too. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your puppy.

What can help

Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.

Interactive Activity Ball Dog Toy with Cover

A bouncy activity ball in a tough zip-on cover that keeps dogs chasing, nudging and herding for hours.

From£23.99

Self-Moving Chew-Resistant Dog Ball

A USB-C rechargeable ball that moves on its own to keep dogs busy and active. Tough E-TPU construction stands up to chewing during supervised play, and the splash-resistant build suits indoor or outdoor use.

£15.99

Inflatable Herding Ball for Dogs with Pump

A large inflatable herding ball with pump that taps into your dog's chase instinct.

From£19.99

Inflatable Herding Ball with Handles for Dogs

A large, tough inflatable herding ball that taps into your dog's natural chase-and-nudge instinct. Reinforced bite-resistant fabric and grab handles make it great for active outdoor play with medium and large breeds.

£29.99

Common questions

Is it normal for puppies to eat grass?: Yes, casual grass grazing is common in puppies and is usually just exploratory or habitual behaviour rather than a sign of illness. It only needs attention if it becomes frantic, frequent, or is accompanied by vomiting or a change in your puppy's normal behaviour.
Should I stop my puppy eating grass?: There is no need to stop occasional grazing on grass you know has not been treated with chemicals. It is worth interrupting if the lawn has been treated, if pellets or other garden products may be present, or if the behaviour looks obsessive rather than relaxed.
My puppy ate grass and was sick afterwards, is that normal?: It can happen without anything being seriously wrong, but a puppy who was already feeling off is more likely to vomit after eating grass than one who was well beforehand. If it happens repeatedly, or your puppy seems unwell in any other way, speak to your vet rather than assuming the grass was the cause.
What about lungworm from grass?: Lungworm is carried by slugs and snails, which live in the same grass puppies graze on, and it is a genuine risk in the UK. It is worth asking your vet what prevention is appropriate for your puppy and the area you live in, rather than relying on avoiding grass alone.

Sources

Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.

Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.