Overview
Grass seeds might look harmless, but they can pose a serious risk to dogs. Their sharp, barbed tips can pierce the skin or get into ears, eyes, or noses — and once inside, they don’t break down. Instead, they can move deeper into the body, causing pain, infection, or even damage to vital organs.
Long grass poses the greatest risk. Most cases happen in summer (the odds of a dog being diagnosed with grass seed-related issues in July are over 170 times higher than in January), and the most-affected breeds are those who are very active or long-coated. The best protection is prevention: check your dog after every walk, and speak to your vet straight away if you find a seed or notice signs of discomfort.
How do grass seeds get into dogs?
Grass seeds have evolved to have an arrowhead shape and tiny barbs, both of which help them grip and travel forwards. When dogs run through long grass, seeds easily catch on fur, especially around the paws, ears, armpits, and tail. From there, they can pierce the skin or enter openings like the ear canal or eyelids, gradually working deeper into the body. Less common — but still possible — entry points include the mouth, throat, and genitals, where seeds can be harder to spot but cause significant discomfort.
The dogs most at risk are those with long or feathery coats, such as Spaniels, Retrievers, and Poodles, or breeds with floppy ears, like Cockapoos or Setters. Working dogs and dogs who go walking in meadows, fields, or overgrown woodland are also more likely to pick up grass seeds. Even short-haired dogs can pick them up if they explore tall grasses during the summer.
What are the symptoms of grass seeds in dogs?
The symptoms of grass seed foreign bodies in dogs can be very different depending where in the body they lodge, and they can lodge in lots of different places. Some symptoms may show up within hours, but others take days or even weeks if the seed travels deeper. Knowing what to watch for helps you act early — before things get worse. These are the common places grass seeds end up, and the common symptoms linked with each place:
Ears: head shaking, pawing at the ear, crying out, head tilting, signs of an ear infection (such as redness or discharge), or pain when touched
Eyes: redness, squinting or holding eye closed, blinking more than usual, watery or weepy eyes, pawing at the face, swelling, or light sensitivity
Nose: frequent sneezing (sometimes in fits), nasal discharge (clear or with slight traces of blood), or pawing at the muzzle
Paws: constant licking or nibbling, sudden limping, swelling between toes, or brown staining from persistent grooming, small wounds with fluid discharge
Skin: small lumps or swellings, redness, pus, or a visible grass seed tip
No matter where the grass seed has ended up, it can lead to lethargy, fever, loss of appetite, or wounds that won’t heal — especially if it has migrated internally. Even mild symptoms after a walk through long grass should prompt a careful check. Grass seed injuries can escalate quickly, so acting quickly is important.
Read more: Bacterial infections in dogs
What should I do if I spot grass seeds on my dog?
If you spot a grass seed on your dog’s coat and it hasn’t pierced the skin, you can gently remove it using your fingers, a soft brush, or a damp cloth. But there are some important things you’ll need to do:
Stop your dog from licking or scratching the area
Move to a quiet, well-lit space for a closer look
Check other common trouble spots: between the toes, inside the ears, under the armpits, and around the eyes
Never try to remove a seed that’s embedded in the skin or stuck inside the ear, nose, or eye. You could accidentally push it deeper, break it apart, cause more pain, or risk infection. In these cases, see your vet right away, and in any cases where you see spot redness, swelling, discharge, a puncture wound, or where your dog reacts as if it’s painful.
How do vets treat grass seeds in dogs?
If you suspect your dog has a grass seed injury, seek veterinary care as soon as possible. Because grass seeds rarely show up on X-rays, your vet may rely on an otoscope for ear checks, magnification for eye exams, or imaging like ultrasound or CT scans for deeper cases. Just like the symptoms, treatment depends on the location:
Ears: here, the seed will most likely be removed with long forceps, often under sedation if the ear is inflamed or the seed is deep.
Eyes: local anaesthetic or sedation is needed to remove seeds from around or in your dog’s eyes. While your dog is sedated, your vet will check their eyes for scratches or ulcers.
Paws or skin: minor surgery under sedation if the seed has dug into one of these spots, especially if it has caused an abscess or cyst.
Nose or internal migration: these cases may require advanced imaging and more complex surgery.
After removal, vets may prescribe antibiotics to prevent infection (seeds can carry bacteria, and even sometimes fungi) and pain relief to keep your dog comfortable. Follow-up appointments may be needed to ensure no fragments of the seed remain. Costs vary greatly — from modest fees for simple extractions to higher costs for surgery or specialist referrals — making early intervention the most cost-effective and least invasive option.
Read more: Summer don'ts for dog owners
How can I keep my dog safe from grass seeds?
You can’t avoid every grass seed — but with the right habits, you can greatly reduce the risk of injury. Prevention is all about limiting exposure and making checks part of your routine:
Be extra careful from late spring to early autumn, when grass seeds are at their peak
Keep your garden lawn short and clear away cuttings
Avoid meadows, overgrown verges, and long grass during seed season — especially areas with foxtails or wild barley
Trim feathered fur around the paws and ears in long-haired breeds, or book a summer grooming session
After every walk, check between the toes, inside the ears, under the armpits, and around the eyes
Daily brushing helps catch seeds early
For dogs with recurring issues, protective boots or lightweight body suits can help during high-risk months
Read more: When can puppies go outside?
FAQs about grass seed and dogs
Can grass seeds be fatal for dogs?
Yes — though it’s rare. If a seed reaches a vital organ, causes a severe infection, or blocks the airways, it can be life-threatening. The risk increases if treatment is delayed, which is why early action is so important.
Which grasses are most dangerous?
Foxtails and wild barley pose the greatest risk. Their barbed seeds are built to move forward and can easily work into fur, skin, ears, eyes, or even the nose.
Can grass seeds affect internal organs?
Yes. Seeds can be inhaled, swallowed, or travel under the skin to reach organs like the lungs, stomach, or bladder. This can lead to serious illnesses like pneumonia, or even cause blockages in your dog’s digestive system.
Can grass seeds cause allergic reactions?
Yes. Even if they don’t break the skin, grass seeds can cause irritation, hives, or localised itching — particularly in sensitive dogs.
Is my garden grass seed dangerous?
It can be. Freshly scattered lawn seed may cling to your dog’s coat or paws, especially before it’s watered in or starts growing. Once established, the risk is low — but until then, check your dog after they’ve been outside.
What do studies say about grass seeds in dogs?
Veterinary research has revealed some surprising facts about grass seed injuries in dogs — including the unusual places seeds can end up, the diseases seeds can carry, and greater detail on which dogs are most at-risk.
A 2021 study reported rare cases where grass seeds migrated into the uterus, usually in spayed females. These cases were difficult to diagnose, as scans often showed no obvious changes. The only signs may be discharge or discomfort around your dog’s rear, which can be easy to miss. The findings suggest that if a female dog is neutered but retains her uterus (the name of this type of spaying is an ovariectomy), she may have an additional risk of grass seeds compared to a female dog who is neutered by having both ovaries and uterus removed (an ovariohysterectomy). However, the study authors state that neutering status wasn’t a significant risk factor overall. In fact, the study found that male dogs were at a higher risk of grass seed injuries, likely due to how much they roam and explore. Another interesting finding of the study was that (among the vet practices they took their data from) the East of England had the highest amount of grass seed foreign bodies cases, while Wales had the least.
A different 2021 study analysed more than 4.5 million UK vet visits and found that grass seed injuries peak in summer — especially in July, when the risk is over 170 times higher than in January. Spaniels, other working breeds, and small terriers are more likely to be affected. Similar to the other 2021 study, male dogs were also found to be at higher risk than female dogs. The average high-risk age is around four years old, with rural dogs facing greater exposure than those in urban areas.
In 2018, a study examined cases where dogs had inhaled grass seeds and found that every seed carried bacteria — and some also carried fungi. If the seed lodges inside the body, these microbes can lead to serious infections. Staphylococcus was common in the upper airways, while E. coli appeared more often in the lower. The threat of these diseases is yet another reason why removing the seed quickly is essential. After the seed is removed, vets may prescribe your dog medication to reduce the risk of infection.
Need more advice?
If you have any questions about grass seeds in dogs, or suspect your dog might have grass seed foreign bodies, see your vet today. Find your nearest practice with our Find a Vet tool.
Pet Health Club Plus members get unlimited consultations, and 24/7 access to video vets through PawSquad. These are super handy for owners with dogs at a higher risk of grass seed exposure.
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Medically reviewed by Lizzie Youens, BSc(Hons) BVSc MRCVS
Published on 03/09/2025 • Reviewed on 03/09/2025