Grass Seeds for Dogs: Summer Walking Hazard (Foxtails & Awns)

Grass seeds (foxtails/awns) are a serious summer hazard for dogs. They can enter ears, eyes, nose, paws and migrate into tissues — know how to prevent, spot, and respond.

Quick Facts — At a Glance

• Season: late spring to early summer (seed set often begins when daytime temperatures consistently reach ~60°F / 15°C and dry conditions follow).
• Hazard: grass seeds ("foxtails" or awns) are barbed; they penetrate fur or skin and migrate deeper with movement.
• Common entry points: paws/interdigital spaces, ears, nose/sinuses, eyes, skin/coat.
• Action: check dogs after walks in tall grass; remove visible seeds carefully; seek veterinary care for eye, ear or deep tissue involvement.

Why grass seeds are dangerous

Many grass species produce sharp, barbed seed heads (commonly called foxtails or awns). Their shape — a pointed tip with backward-facing barbs — makes one-way entry easy: they can penetrate hair, skin, or mucous membranes and then move deeper with each step, shake, or breath. Once inside tissue, they cause local inflammation, infection, abscesses and can migrate to vital areas (ears, lungs, abdomen, chest), sometimes weeks or months after the first exposure.

Authoritative veterinary organizations warn that these are a seasonal emergency hazard for dogs and cats: the American Veterinary Medical Association (AVMA) and veterinary emergency texts document the risk of migration and secondary infection (abscess, pyothorax, etc.).

Primary citation: AVMA (see citation field below).

Who is most at risk?

• Dogs that walk or work in fields, rangeland, dog parks with tall grass, orchards or un-mown verges.
• Long-haired breeds: Cocker Spaniels, Springer Spaniels, Setters, Shepherds, and any dog with long feathering — awns cling to coats and find a way in.
• Hunting and working dogs that run through brush and detritus.
• Puppies and young dogs — inquisitive nose-first behavior and less experienced handlers checking them.
• Brachycephalic (flat-faced) breeds can be prone to nasal/ocular entry due to facial anatomy and shallow nostrils.
• Dogs with floppy ears — moist ear canals plus barbed seeds increase ear penetration risk.

Common entry points and what to look for

Paws and interdigital spaces

Signs:

• Sudden licking, biting or chewing at feet
• Limping or intermittent lameness
• Redness, swelling between toes
• Foul-smelling discharge or a draining tract
• Visible seed lodged between toes or in paw pad

First-aid tip: if you can see a seed that is shallow and easily grasped, you can remove it with clean tweezers. Clean the area with 0.9% sterile saline (20–50 mL irrigation) and apply a clean bandage. Seek veterinary care if you cannot remove it fully or if the area is swollen, painful, or draining.

Ears

Signs:

• Intense head shaking and ear scratching
• Pawing at the ear
• Harsh odor and dark discharge
• Sudden painful behavior when ear is touched

Do not attempt deep removal: if you cannot see and safely grasp the visible seed at the entrance of the ear canal, do not probe. Transport to a veterinarian for otoscopic inspection and removal under sedation if required.

Nose and nasal cavities

Signs:

• Sneezing fits or reverse sneezing
• Unilateral (one-sided) nasal discharge, often bloody or mucopurulent
• Pawing at the nose
• Recurrent sneezing or snorting that doesn't resolve in 24–48 hours

Eyes and surrounding tissues

Signs:

• Squinting, blinking, or holding the eye closed
• Excessive tearing or mucous discharge
• Redness of the conjunctiva
• Corneal ulceration or visible foreign body on the surface

Skin and coat (subcutaneous migration)

Signs:

• Small red, hot swelling (often with a draining tract)
• Repeated localized licking or rubbing
• Firm subcutaneous nodules that may move under the skin

Thoracic and abdominal migration

Rare but serious: awns can penetrate deeply, cross tissue planes, and reach the chest or abdomen. In the chest they can cause coughing, fever, lethargy, pleural infection (pyothorax) or lung abscesses. These complications often require advanced imaging (CT/radiographs), drainage and surgery.

Timeframe: migration and clinical signs can be delayed — days to months after exposure.

Prevention — practical, specific strategies

First-aid and emergency response — what you can do immediately

• Stay calm and restrain your dog gently.
• Visual removal: if a seed is superficial and easily grasped, use clean tweezers and remove it in the same direction it entered. If it breaks, stop and seek veterinary care.
• Eye: flush with sterile saline using a syringe (10–50 mL depending on dog size) until comfortable and no debris is visible. Cover the other eye to reduce stress and transport promptly.
• Ear: if a small seed is sitting at the entrance of the ear canal and easily grasped, remove it carefully. If not readily visible, do not probe the canal.
• Paw wounds: irrigate with sterile saline (20–50 mL), dry, and apply a clean non-adhesive dressing. Limit activity and seek vet care if limping persists.
• Avoid human medications: do not give acetaminophen (paracetamol), ibuprofen, naproxen or aspirin to a dog without veterinary advice. These can be toxic.

• Any eye involvement, sudden intense ocular pain, corneal ulcer appearance, or persistent discharge.
• Signs of systemic illness (fever, lethargy, inappetence), worsening lameness, swelling that increases, or recurrent draining tracts.
• If you could not remove a visible seed, or removal was incomplete.

Diagnostic and veterinary treatments

Veterinarians will examine and may use:

• Otoscopy for ear foreign bodies
• Ophthalmic exam with fluorescein stain for corneal ulcers
• Imaging: radiographs, ultrasound, or CT to locate subcutaneous or migrating awns
• Rhinoscopy for nasal foreign material
• Surgical removal under sedation or general anesthesia for deep or migrating awns
• Antibiotics and pain relief for infected wounds — prescribed based on weight, species and exam findings. (Do not administer human antibiotics or painkillers without veterinary prescription.)

When to See a Vet — clear guidance

Seek veterinary attention immediately if your dog has any of the following after being in tall grass:

• Eye pain, squinting, pus or blood from an eye
• Ear pain, persistent head shaking, foul-smelling ear discharge
• One-sided nasal discharge (especially bloody) or persistent sneezing
• Lameness lasting more than 24–48 hours, swelling, or draining tracts
• Fever, lethargy, inappetence, coughing or breathing changes

Specific timelines and red flags

• Immediate: severe irritation, pawing, ear shaking, sneezing/sneezing fits can occur within minutes.
• 24–72 hours: local infection and pain often become obvious.
• Days–weeks: migration causing abscesses, draining tracts or respiratory signs.
• Weeks–months: deep migration to chest or abdomen with systemic illness is possible; history of prior grass-seed exposure can be a clue.

Key Takeaways

• Grass seeds (foxtails/awns) are a seasonal, often hidden hazard in late spring and summer when grasses dry out — watch for exposure when daytime temps consistently reach ~60°F / 15°C.
• They can enter ears, eyes, nose, paws and skin, then migrate deeper causing infection, abscesses or organ damage.
• Prevention is practical: avoid tall grass, trim coats, use booties, inspect dogs after walks and manage yards by mowing before seed set.
• Immediate first aid (sterile saline irrigation, careful tweezers removal of superficial seeds) can help, but do NOT probe deeply or give human meds.
• See your vet promptly for eye, ear, nasal, persistent lameness, swelling, draining tracts or any systemic signs.

Sources and Further Reading

• American Veterinary Medical Association (AVMA) — information on plant awns/foxtails and pet hazards.
• Merck Veterinary Manual — foreign bodies and migrating plant material references.

Frequently Asked Questions