Vent Gleet in Chickens: How to Clear the Cloacal Infection

Vent gleet looks and smells alarming — a crusty, foul-smelling white discharge caked around a hen's back end — but it's usually very treatable when you handle the actual cause rather than just the mess. The catch is that the most common home instinct (antibiotics) can backfire, and a lot of online advice oversimplifies what's really going on. Here's the accurate picture, from veterinary sources.

What vent gleet actually is

The medical name is cloacitis — inflammation of the cloaca, the chamber where a hen's digestive, urinary, and reproductive tracts all meet at the vent.¹ Most of the time it's an overgrowth of Candida albicans (the same yeast behind thrush), which is why it's often called a fungal infection.²

How to recognize it

• Sticky white or yellowish, paste-like discharge from the vent.²
• Crusted, hard, dirty feathers around the vent and tail, often with feather loss.
• A strong, unpleasant, yeasty or sour smell — frequently the first thing keepers notice.²
• Reddened, irritated skin around the vent.
• The hen usually keeps eating and drinking in mild cases and otherwise seems fairly normal.²

Treatment, step by step

Step 1 — Clean the vent

Give her a warm soak (a shallow tub of comfortably warm water, Epsom salt optional) and gently soften and remove the crusting around the vent. Don't rip at stuck material — soak until it lifts. Trim heavily soiled feathers if needed. Dry her thoroughly afterward and keep her warm while she finishes drying.

Step 2 — Treat the cause (usually antifungal + gut balance)

For the common yeast form:

• Apply an over-the-counter antifungal cream (the same clotrimazole/miconazole products sold for human use, e.g. Canesten or Monistat) to the cleaned vent area.⁵
• For stubborn cases, a vet may prescribe oral nystatin (an antifungal) for 7–10 days.⁵
• Give probiotics to rebuild the healthy gut bacteria that keep yeast in check — this addresses the root imbalance, not just the symptom.⁵

Step 3 — Fix the environment and diet

Since the trigger is almost always a gut imbalance, remove the source: toss any moldy or spoiled feed, clean and refill waterers, improve coop sanitation, and avoid high-sugar or very high-water treats during recovery (one vet specifically warns that sugary "molasses flush" remedies just cause more diarrhea).³

Step 4 — Know when to escalate

If there's no improvement in 3–4 days, the discharge turns yellow-green or bloody, she stops eating, or she seems systemically unwell, see a vet.⁷ Those can signal a bacterial cause, an oviduct infection, or another underlying problem that home antifungal care won't fix.

What not to do

• Don't use antibiotics on the common yeast form (see above).
• Don't use tea tree oil — its terpenes can be toxic to birds.⁵
• Don't rely on sugary molasses flushes — they tend to worsen diarrhea.³
• Don't feed high-water fruits and veggies during an active case, which adds to loose droppings.⁵

Prevention

• Keep feed dry and mold-free; clean waterers regularly.
• Offer probiotics or a little plain live yogurt periodically to support gut flora.
• Keep the coop clean and dry, and reduce stressors.
• Address any sour crop, pecking injuries, or prolapse promptly, since these can precede vent gleet.²

Frequently asked questions

What is vent gleet?

It's cloacitis — inflammation and infection of the vent, usually from a Candida yeast overgrowth, though it can be bacterial. The trigger is generally a gut imbalance from stress, diet, moldy feed, or recent antibiotics.

How do you treat it?

Clean the vent with a warm soak, then treat the cause: an antifungal (OTC cream, or vet-prescribed nystatin for stubborn cases) plus probiotics, with a clean dry environment. No improvement in 3–4 days or a severe case means see a vet.

Should I give antibiotics?

Not for the common yeast form — they kill good gut bacteria and can worsen it. Since some cases are bacterial, have a vet identify the organism before medicating anything beyond a mild case.

Is it contagious?

Not highly between hens, but a rooster can spread it by mating with infected hens. Keep conditions clean to prevent the gut imbalances that cause it.

What does it smell like?

Strong, unpleasant, often yeasty or sour — many keepers notice the smell first, along with sticky white discharge and crusted vent feathers.

Can apple cider vinegar cure it?

ACV in water is a common supportive/preventive measure, not a reliable standalone cure. Treat an active case with cleaning and an antifungal; use ACV for prevention, not as a substitute for care in a severe case.

Will it go away on its own?

A very mild case might if the trigger resolves, but it often persists or recurs and can worsen, so it's better to treat early — caught early it's very manageable.

Can I eat the eggs?

The gleet itself generally isn't an egg food-safety concern, but follow the egg-withdrawal guidance for any medication used, and ask your vet if using a prescription product.

How we reviewed this article

This guide draws on poultryDVM, the British Hen Welfare Trust, university-affiliated poultry veterinarians, and established poultry-health resources rather than folk remedies. Every clinical claim is numbered to a source below, including the important point that US vent gleet is often bacterial rather than fungal. We deliberately flag the common antibiotic mistake and toxic remedies to avoid. This page is scheduled for review by a licensed veterinarian; the reviewer's name and date will appear here once complete.

Sources & references

1. poultryDVM. Vent Gleet (Cloacitis). Definition as cloaca inflammation; multifactorial causes (fungi, bacteria, protozoa, stress, hormonal). poultrydvm.com
2. British Hen Welfare Trust. Vent Gleet. Candida cause, discharge/crusting/smell signs, rooster transmission, recurrence. bhwt.org.uk
3. Backyard Poultry (interview with Dr. Donna Kelly, UPenn School of Veterinary Medicine). Vent Gleet in Chickens. Often bacterial in the US; multifactorial; warning against sugary molasses flushes. backyardpoultry.iamcountryside.com
4. Rural Veterinary Outreach. Vent Gleet (Cloacitis). Bacterial/viral/mycotic/parasitic causes; home care then vet if no improvement in 3–4 days. ruralveterinaryoutreach.org
5. Chicken Fans. Vent Gleet in Chickens: Causes and Treatment. Nystatin, OTC antifungal creams, probiotics; do-not-use list (antibiotics, tea tree oil, high-water food). chickenfans.com
6. Southland Organics. Vent Gleet & Pasty Butt. Distinction from chick pasty butt; gut-imbalance triggers. southlandorganics.com
7. Chicken-keeping veterinary guidance on escalation: seek a vet if signs persist or worsen after roughly a week of home treatment. reference

Sources current as of September 2026. Educational content, not a substitute for veterinary care.