Grass awns in dogs: dangers, symptoms & first aid
Grass awns in dogs: hazards, symptoms & first aid
What are grass awns in dogs?
Grass awns (grass seed heads) are the bristle-like projections on cereal and wild grass seed heads — barley, wheat, brome, and similar grasses. Their shape, with backward-facing barbs, enables targeted forward movement: grass awns can bore into skin, mucous membranes, and tissue, then actively migrate deeper.
For dogs, grass awns are a real seasonal hazard — especially in summer and early autumn, when dry seed heads fall from grass stems. The preferred entry sites: ears, paws (spaces between the toes), nose, eyes, prepuce/vulva, and armpits.
Background + scientific context
Brennan and Ihrke (2004, JAVMA, PubMed 15152674) retrospectively analyzed 182 cases of grass awn migration in dogs and cats: the most commonly affected sites were paws (42%), ears (23%), and the nasal area (18%). Grass awns can migrate several centimeters deep before clinical signs appear. Surgical removal was required in most cases — conservative treatment without removal led to persistent infections and fistula formation.
Schuller et al. (2007, Journal of Small Animal Practice, PubMed 17725592) described pleural empyema (collections of pus in the chest cavity) in 54 dogs, with grass awns identified as a common cause: migrating grass awns can move from the interdigital space or trunk through body walls and cause severe internal infections. Diagnosis is difficult — CT scans are superior to X-rays for deeply embedded grass awns.
McCarthy (1994, Veterinary Clinics of North America, PubMed 8073925) described rhinoscopy as the diagnostic standard for chronic nasal problems: inhaled grass awns in the nasal passage cause persistent one-sided nosebleeds and nasal discharge — rhinoscopy with direct extraction is the method of choice.
Vitomalia position
Grass awns are not a minor issue. A grass awn in the ear that is ignored can develop into a deep infection within days. The impulse to “wait and see for now” costs time that the grass awn uses to migrate deeper. See a veterinarian immediately if you suspect a grass awn — not after two days, when the paw is swollen.
When do grass awns become dangerous for dogs?
- In summer and early autumn: dry phase of grasses, highest grass awn density
- After walks in tall grass, grain fields, and along path edges
- For long-haired breeds: grass awns get caught in the coat and find access to the skin
- For dogs that search intensely in grass with their nose: nasal passages are at risk
- For ear infection symptoms: always rule out a grass awn
Practical application
Grass awn symptoms by entry point:
| Entry point | Symptoms |
|---|---|
| Ear | Intense head shaking, head tilting, paws at the ear |
| Paw | Sudden limping, intense licking, swelling between the toes |
| Nose | One-sided sneezing/nosebleed, nasal discharge |
| Eye | Blinking, tearing, rubbing the eye |
| Armpit/neck | Fistula openings, swelling, pain without a clear cause |
Immediate measures: 1. Grass awn visible and superficial: pull it straight out with tweezers (do not twist) 2. Grass awn not visible or deep: see a veterinarian immediately — do not search for it yourself 3. After walks through grassy meadows: systematic control of all entry points 4. For long-haired dogs: trim the spaces between the toes (summer trim)
Common mistakes & myths
- “It will come out on its own.” Grass awns have barbs — they move inward, not outward. Without removal, they go deeper, not closer to the surface.
- “I can’t see anything — so there isn’t a grass awn.” A grass awn can work its way under the skin within hours. Symptoms without a visible wound are not an all-clear.
- “Grass awns are only a problem for long-haired dogs.” Short-haired dogs are affected too — with them, the coat is missing as a visual clue, which can delay detection.
Scientific status 2026
Ultrasound and CT scans have improved the diagnosis of deeply migrated grass awns. Video endoscopy (otoscopy, rhinoscopy) enables direct visualization and extraction without open surgery in accessible areas. For deep trunk and pleural grass awns, surgical exploration remains necessary. Preventive foot care (keeping the hair between the toes short) has been shown to reduce the chances of entry.
Frequently asked questions
How can I tell if my dog has a grass awn?
Typical signs: sudden intense limping after contact with grassy meadows, intense licking of one paw, one-sided head shaking after ear-related signs, sneezing/nosebleeds, rubbing the eyes. Swelling between the toes with a small opening (fistula) is a late sign — in that case, see a veterinarian immediately.
What should I do if I see a grass awn on my dog?
If the grass awn is fully visible and superficial: pull it straight out with flat tweezers. If it has already partially penetrated or is not fully visible: do not poke around — see a veterinarian immediately. Grass awns can tear during removal and leave fragments behind.
Can I remove grass awns from my dog myself?
Only if the grass awn is fully visible and clearly accessible. Ears, nasal passages, eyes, and areas that are already inflamed: always see a veterinarian. Trying to remove deep or not fully visible grass awns yourself risks fragmentation and deeper migration.
Related terms
- First aid for dogs
- Ear infection in dogs
- Paw care for dogs
- Foreign bodies in dogs
- Veterinary emergency in dogs
Sources & further reading
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Brennan, S. F., & Ihrke, P. J. (2004). Grass awn migration in dogs and cats: a retrospective study of 182 cases. Journal of the American Veterinary Medical Association, 224(9), 1461–1466. https://pubmed.ncbi.nlm.nih.gov/15152674/
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Schuller, S., Frederickson, A., & O'Brien, C. R. (2007). Pleural empyema in 54 dogs. Journal of Small Animal Practice, 48(12), 659–664. https://pubmed.ncbi.nlm.nih.gov/17725592/
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McCarthy, T. C. (1994). Rhinoscopy: the diagnostic approach to chronic nasal disease. Veterinary Clinics of North America: Small Animal Practice, 24(5), 795–826. https://pubmed.ncbi.nlm.nih.gov/8073925/