When is grass seed season in the UK?

It broadly runs from around May through to September, when grasses are setting and dropping seed heads, though the exact timing varies with the weather each year. Risk is highest wherever dogs walk through long, unmown grass or meadows.

How do I know if my dog has a grass seed stuck in their paw?

Sudden limping or persistent licking at one paw, especially between the toes, are the classic signs. If you cannot see anything on the surface but the limping continues, it is worth a vet visit rather than waiting to see if it resolves on its own.

Can grass seeds cause serious harm to dogs?

Yes, if left untreated a seed can migrate under the skin and cause a painful, infected track some distance from where it entered. Prompt removal, ideally before it burrows at all, generally means a much simpler outcome than one found later.

Which dog breeds are most at risk from grass seeds?

Breeds with feathered feet or long, floppy ears, such as spaniels, are more prone to picking up seeds in their fur without it being obvious straightaway. Any dog walked regularly through long grass is at higher risk regardless of breed, though.

Grass seed season: what dog owners need to know

Through the warmer months, grasses set seed and drop sharp, barbed heads that can work their way into a dog's paws, ears, eyes or nose during a walk through long grass. The barbs only move one way, so once a seed starts to burrow it keeps going rather than falling back out, which is what makes this a genuine seasonal hazard rather than a minor irritation.

Why grass seeds are more dangerous than they look

A grass seed head has tiny backward-facing barbs, the same shape that lets it hitch a ride on an animal's coat to spread in the wild. Once caught between the toes, in the ear canal, or against the eye, those barbs let it push forward through movement and friction but stop it coming back out the way it went in.

Left alone, a seed can migrate under the skin, causing a painful, swollen track that sometimes ends up a long way from where it first went in. It is a genuinely common reason for a same-day vet visit through the summer, and one that catches owners out because the entry point itself is often tiny and easy to miss.

Which dogs and areas are most at risk

Dogs with feathered feet or long, floppy ears — spaniels are a classic example — are more prone to trapping seeds in their fur where they are not immediately obvious. Any dog walked regularly through long grass, meadows, or unmown verges is at higher risk than one who mostly walks on pavement or short grass.

The paws, between the toes especially, are the most common site, followed by ears, eyes and the nose. A dog suddenly limping, shaking their head repeatedly, sneezing in fits, or pawing at an eye during grass seed season should be checked with that possibility specifically in mind.

Checking after every walk

A quick check of paws, between the toes, ears and around the eyes after any walk through long grass takes a minute and catches most seeds before they have a chance to burrow. Keeping the fur between paw pads trimmed on breeds prone to matting there removes one of the easiest places for a seed to hide unnoticed.

If you spot a seed sitting on the surface, it can often be removed carefully by hand or with tweezers before it causes any harm. Once it is not visible but your dog shows sudden signs of discomfort in a specific spot, that is a job for a vet with the right tools rather than something to keep looking for at home.

When to see a vet

Sudden limping with no obvious cause, persistent head shaking, a swollen or watering eye, or repeated sneezing during the warmer months are all reasons to get your dog seen promptly. The earlier a seed is found and removed, the simpler the treatment tends to be, compared with one that has already migrated under the skin.

Grass seed season is not something to panic about on every walk, but a few minutes checking your dog over afterwards, especially through the peak summer months, is a genuinely effective habit for catching a problem before it becomes a bigger one.

Common questions

When is grass seed season in the UK?: It broadly runs from around May through to September, when grasses are setting and dropping seed heads, though the exact timing varies with the weather each year. Risk is highest wherever dogs walk through long, unmown grass or meadows.
How do I know if my dog has a grass seed stuck in their paw?: Sudden limping or persistent licking at one paw, especially between the toes, are the classic signs. If you cannot see anything on the surface but the limping continues, it is worth a vet visit rather than waiting to see if it resolves on its own.
Can grass seeds cause serious harm to dogs?: Yes, if left untreated a seed can migrate under the skin and cause a painful, infected track some distance from where it entered. Prompt removal, ideally before it burrows at all, generally means a much simpler outcome than one found later.
Which dog breeds are most at risk from grass seeds?: Breeds with feathered feet or long, floppy ears, such as spaniels, are more prone to picking up seeds in their fur without it being obvious straightaway. Any dog walked regularly through long grass is at higher risk regardless of breed, though.

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.