A prolapsed vent — often called a ‘blowout’ — is when the oviduct, cloaca, or intestinal tissue protrudes out through the vent opening after laying. It is an immediate emergency for two reasons: the exposed tissue is extremely vulnerable to damage from the environment, and other chickens will aggressively peck at the red, protruding tissue if the hen is not isolated immediately. Swift action is critical to saving the bird.
Quick Facts
| Definition | Internal oviduct/intestinal tissue protrudes through the vent |
| Urgency | Immediate emergency — flock mates will peck at exposed tissue |
| Causes | Large eggs, early laying, obesity, straining, calcium deficiency |
| First Aid | Isolate immediately, clean tissue, apply hemorrhoid cream, replace if possible |
| Prognosis | Good if caught early; poor if tissue is damaged or recurs |
| Prevention | Delay lay onset, ensure proper nutrition, prevent obesity |
Recognizing a Prolapse
A prolapsed vent is immediately visible — red, pink, or glistening tissue protrudes visibly from the vent. The tissue may be small (just slightly protruding after laying) or large and significant. The hen will typically show signs of distress and may be straining. Other birds in the flock will quickly be attracted to the red tissue and begin pecking — cannibalism can destroy the tissue and kill the hen within hours if not caught immediately.
Differentiate prolapse from a very dirty, matted vent area (pasty vent in chicks) or from a swollen vent in an egg-bound bird. With prolapse, actual tissue is protruding — this is unmistakable once you’ve seen it.
Immediate First Aid
Isolate the hen immediately. This single step can save her life — every minute she remains with the flock increases the risk of tissue damage. Clean the prolapsed tissue very gently with warm water and mild saline solution, removing any bedding, feces, or debris. Do not scrub.
Apply hemorrhoid cream (Preparation H) generously to the tissue — this reduces swelling and helps the tissue retract. Keep the tissue moist with water or sterile lubricant. In mild prolapses that have just occurred, gentle steady pressure with a clean, gloved finger may push the tissue back through the vent. The hen must then be kept isolated in dim lighting (which reduces the urge to lay) until you can determine whether the prolapse recurs.
Veterinary Treatment
Any prolapse that cannot be manually reduced at home, that involves significant tissue damage, or that recurs after reduction requires veterinary care. A vet may place a temporary suture (purse-string suture) around the vent to hold the tissue in while swelling resolves, prescribe antibiotics if infection is present, and advise on long-term management.
Hens with recurrent prolapse may benefit from hormonal implants that suppress egg production, giving the oviduct time to heal. Some chronic cases are not recoverable and humane culling is the kindest option.
Prevention
The primary risk factors for prolapse are the same as for egg binding: young pullets coming into lay before they’re fully physically mature, large double-yolk eggs, obesity, calcium deficiency, and excessive light stimulation. Managing lighting to avoid rushing pullets into production, keeping birds at a healthy weight, ensuring constant access to oyster shell calcium, and selecting breeds appropriate for your climate and management system all reduce risk.
High-production hybrid layers are statistically more prone to prolapse than heritage breeds. If you keep high-production layers, be especially vigilant about calcium supplementation and body condition scoring.
Frequently Asked Questions
Can a chicken survive a prolapsed vent?
Yes, absolutely — if caught immediately and treated correctly. Mild prolapses that are reduced within the first few hours have an excellent prognosis. Prolapses that are pecked by flock mates, have damaged tissue, or have been present for many hours without treatment have a much poorer prognosis.
What does hemorrhoid cream do for prolapse?
Hemorrhoid cream (Preparation H) contains vasoconstrictors and anti-inflammatory agents that reduce swelling in the prolapsed tissue, making it smaller and easier to manually replace. It also lubricates the tissue. It is the most commonly recommended and readily available first aid for vent prolapse.
How do I stop other chickens from pecking the prolapse?
Isolate the affected hen immediately and completely. Even brief continued exposure to flock mates with a visible prolapse will result in serious pecking injury. Keep her isolated in a dim, quiet space until the prolapse is resolved and fully healed before attempting reintegration.
Will the prolapse come back?
Recurrence is common, especially if the underlying cause is not addressed. A hen that has prolapsed once is at higher risk of recurring prolapses, particularly at peak production or when passing large eggs. Some hens have only one episode and never prolapse again; others become chronic cases.
Should I cull a chicken with prolapse?
A mild, first-time prolapse that is quickly treated and does not recur does not warrant culling. However, a hen with recurrent prolapses, significant tissue damage, or infection that is not responding to treatment may be suffering, and humane culling is appropriate and kind in those cases.
From Our Community
Real questions from backyard chicken keepers like you:
Q: My hen seems off but I can’t pinpoint what’s wrong. What should I check first?
A: Start with the basics — is she eating and drinking? Check her crop (should be empty in the morning), look at her droppings, listen to her breathing, and feel her keel bone for weight loss. Any one of these can point you toward the cause.
Q: How do I know when to call the vet vs. treat at home?
A: Call a vet when: symptoms are severe or worsening rapidly, multiple birds are affected, there’s blood, prolapse, or labored breathing, or when 48 hours of home treatment hasn’t helped. When in doubt, call — most poultry vets are happy to advise by phone.
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