Grass seeds are dangerous for dogs. Here's what you should know.

May 25, 2022 - 5 min read
This article is not intended to be a substitute for professional veterinary advice, diagnosis, or treatment. Always seek the advice of your veterinarian with any questions you may have regarding your pet’s care, treatment, or medical conditions.

This article was written for the United Kingdom market and the advice provided may not be accurate for those in the United States.

Curly haired dog playing in grass

Grass seeds might be small, but they can pose a real threat to our pets, especially during late spring and summertime. They’re attached to the tops of long grass stems and can easily brush off onto your dog.

It's a really common problem, particularly for hapless puppies – we had 1,369 pet insurance claims for grass seeds in 2021 alone. The average payout for grass seed claims was £398.24. They can need quite a lot of investigation and maybe even surgery to remove and treat.

Veterinary surgeon Sophie Bell’s own dog horrifyingly lost an eye after getting a grass seed lodged in it, although she says this isn’t one of the usual places pups get them stuck.

“The main areas include in between the toes, inside the ears and under the armpits,” says Sophie and the damage they can do is grisly.

“They are barbed so can penetrate any area of skin and either push themselves deeper into tissues and end up in places like the lungs or migrate under the skin and pop up in another area, usually forming an abscess.”

So although it might sound minor on the surface of it, it's really important to see a vet if you think your puppy might have got a grass seed stuck in their skin, nose, ears or elsewhere.

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How can I tell if my dog has been affected by grass seeds?

Grass seeds embedded in your dog can be very hard to spot.

“The signs are constantly licking the area of penetration or shaking the head if inside the ear. A visible hole where the seed has entered, swelling and sometimes pus from the affected area, “ says Sophie. “Once inside they can migrate rapidly to other areas. It can affect the whole body with systemic signs such as fever, and general malaise."

  • Excessive licking and worrying of the area

  • Head shaking if the seed is in the ear

  • Swelling and pain at the site

  • Discharge, sometimes pus

  • A small visible hole where penetration occurred

  • And systemic symptoms such as a fever, being lethargic and off food

Problems caused by grass seeds can sometimes be very hard to diagnose.

“I remember seeing a two-year-old spaniel who had spent 18 months of his life with on and off illness which improved with Metacam and antibiotics," says Sophie. "Eventually he went for an CT scan and a seed was found within his lung as an abscess. Once removed he returned to full health.”

What problems can grass seeds cause dogs?

The seeds can get into your dog’s ear canals and cause extreme irritation. Your dog will often show marked head shaking, pawing at the ear and their face, creating hotspots which are areas of sore skin on the side of their face and potentially going off food, feeling lethargic and holding their head to one side.

Vet looking into a dog's ear

Even if you were to apply an ear cleaner at this stage, the barbed seeds mean that they’re unlikely to become free and often need removal by your vet.

If you did clean your dog’s ear and the irritation appeared to improve, this could be a sign that the problem was just wax.

"I have witnessed seeds migrate to the lungs of dogs causing abscesses. These dogs have presented with long term waxing and waning illness which has improved with medication then slowly deteriorated.  After further investigation, usually a CT scan, the seed has been found," Says Sophie.

"It’s important to know that grass seeds will not show up on a normal x-ray.  Sometimes, for grass seeds that are in superficial skin areas, a dye can be used alongside normal x-ray to locate them."

Grass seeds can get into your pet’s eye, although this is rare. You may not be aware of this unless your dog shows signs such as marked irritation, redness and pawing at their face. They can rapidly cause problems, and which potentially can lead to the loss of the eye.

But Sophie's had personal experience of this: "As a veterinary surgeon I faced this exact problem with my own dog Chops. At bedtime, all appeared to be fine. There was no evidence of any issue with his left eye. By the morning he was in severe pain and had gone blind and needed an urgent operation to remove his eye.

"We had no clue what the cause was at this stage as there were several diagnoses on the list. His eye was sent to the lab technician who later confirmed it was a foreign body that had caused the problem; very likely a grass seed. But as they can be so very small, we may never have seen it when the surgical site was flushed out. Thankfully he made a full recovery and is managing just fine.

How can I prevent grass seeds affecting my dog?

There are a few things you can do.

Grass seeds will find it easier to get into your dog’s coat if it's thick and especially if it's matted. Regular brushing is important.

"You should introduce a brush from a young age and use it after your walks to check for seeds.  Where appropriate, it may be better to keep the coat shorter in those breeds who appear more prone to picking up grass seeds such as spaniels," says Sophie.

As with most accidents, prevention is better than cure. "For all breeds it's important to check the feet regularly. Feel in-between the toes and closely inspect around and in-between the pads.  It’s a good idea to have the hair between and around your dog's paws trimmed and to clip away the hair from in-between the pads. I’d advise taking your dog to a groomer to have this done. Also, you should feel under the armpits, you could consider having this area clipped short too.

“Using a harness with a chest plate may provide extra protection for the busy dogs who are racing through undergrowth and you could even consider boots for repeat offenders.”

First aid tips

“Owner cannot treat, it themselves,” Sophie warns, although she has some tips for immediate first aid. “You can attempt to help it work its way out by using an overnight poultice, but the sooner you see a vet, usually the less complications and less expense.”

Place a poultice to the affected area. This is only possible when dealing with seeds on the paws. The process involves mixing milk and bread together to make a thick paste. Warming it for a few seconds can usually help make a better consistency. Once the paste has cooled it can be applied to the affected area on a piece of cotton wool or gauze swab. A bandage can then be applied over the top to hold it in place.

"This is not a replacement for your vet, this is to help draw the seed out while you wait for the appointment to see the vet.," says Sophie.

Remember grass seeds can migrate around the body and end up in worrying places like the lungs. Therefore, you do not want to use a poultice any longer than overnight, to see if it is able to draw the seed out. Frustratingly the seeds are often barbed so sometimes your vet needs to make a small incision under sedation to remove it.

Staying vigilant

Check your dog’s coat regularly and pay special attention to the problem areas. Keep on top of grooming and maintain good ear health.

A poultice may help but it is only to be used whilst waiting to see your vet. Grass seeds may be small, but they can cause huge problems if they are not removed quickly.

Irina Wells
Content Marketing Executive

Irina is a former content marketing executive for ManyPets. She has contributed to a number of personal finance sites, including Loot Financial Services and Claro Money.