What it looks like
Enlarged, firm crop — The crop (food storage sac at base of neck) feels hard and distended; may be visible as a large lump
Difficulty swallowing or regurgitation — Bird struggles to eat; may spit out food or liquid; regurgitates food
Loss of appetite — Bird refuses food and water despite hungry birds eating nearby
Lethargy and depression — Bird appears weak, inactive, and huddled; moves slowly
Foul-smelling breath — Breath has a sour, putrid, or yeasty smell indicating fermentation or bacterial overgrowth
Visible discharge from mouth — Foamy, slimy, or foul-smelling liquid drips from beak
Likely causes
- Ingestion of material that blocks the crop: string, plastic, large fiber strands, bedding material
- Coarse hay, straw, or fibrous feed that compacts into an impacted mass
- Lack of grit (grinding stones needed to break down tough plant material)
- Excessive feeding of treats (bread, pasta) without sufficient water
- Bacterial or fungal infection causing fermentation, gas, and crop dysfunction
What to do
Provide fluids (electrolyte solutions) to soften impacted contents. Gentle massage of the crop sometimes helps. In severe cases, a veterinarian may need to manually empty the crop or perform crop washing. Antibiotics may be needed if secondary infection is present. Remove the bird from flock until recovered.
When to see a vet
See a vet if your bird shows severe signs or doesn’t improve within a few days of treatment.
Prevention
Provide proper grit (insoluble grit for grinding; soluble grit for Ca/P balance). Avoid long-fiber bedding as feed. Supervise treat-feeding; offer treats with water. Ensure feed quality (no moldy feed). Provide clean water at all times. Remove hazardous materials (string, plastic) from housing.
Frequently asked questions
Can I treat crop impaction at home?
Mild impactions may resolve with fluids, massage, and rest. However, severe impactions often require veterinary intervention (manual evacuation or surgery). Do not delay seeking vet care if the bird is very weak or shows no improvement within 12 hours.
Is crop impaction contagious?
No, crop impaction is not contagious. It is an individual problem related to what the bird ate or medical dysfunction. However, if the cause is moldy feed or contaminated water, other birds may also be affected—remove and clean the source.
What is grit, and why do chickens need it?
Grit is small stones that birds swallow to help grind food in their gizzard. Without grit, tough plant fibers and seeds pass through unground, increasing impaction risk. Two types: insoluble grit (for grinding) and soluble grit (for Ca/P balance).
How long can a bird survive with crop impaction?
Birds can survive 2-5 days without eating, but crop impaction is painful and leads to bacterial overgrowth, toxin production, and secondary infection. Death can occur within 1-3 days if untreated.