If you've ever wondered what comes out of a chicken's vent besides eggs, you're not alone — that single opening (the vent) handles eggs, droppings and more, and some of what you find in the coop can be alarming the first time you see it. This guide walks through what can come out of a chicken, what's perfectly normal, and what's a sign to call in help.
Short answer: A chicken's vent passes normal eggs, droppings (including smelly cecal droppings), and occasionally oddities like soft-shelled or shell-less eggs, double-yolkers and tiny "fart" eggs — most of which are harmless. A few things, such as a lash egg, a prolapse, worms or fresh blood, mean it's time to contact your vet or a qualified poultry specialist.
Please note: some of the images in this article may be upsetting to some readers.
What is a chicken's vent, and why does so much come out of it?
A hen has a single rear opening called the vent (or cloaca). It's the shared exit for the digestive tract and the reproductive tract, which is why eggs and droppings emerge from the same spot — though never at the same moment, thanks to a neat internal flap that keeps an egg clean on its way out. Understanding what's normal makes the occasional surprise far less worrying. If you're new to egg-laying in general, our overview of all your laying questions answered is a helpful companion read.
Normal eggs (and the weird things chickens lay)
Most of the time, what comes out of a chicken's vent is exactly what you'd hope: a clean, well-formed egg. But healthy hens lay the occasional oddball, and these "weird" eggs are usually nothing to worry about:
- Soft-shell or shell-less eggs: an egg with a thin, rubbery membrane and little or no hard shell. This is common in new layers whose systems are still calibrating, in older hens, in hot weather, or when a bird is short on calcium. The odd one is normal; a run of them is worth noting.
- Double-yolkers: an extra-large egg with two yolks, most common in young hens that release two yolks close together. They're a fun find and perfectly edible.
- Wind eggs (fart eggs / fairy eggs): tiny eggs, often with no yolk at all. They usually appear when a hen's reproductive system is just starting up or winding down.
- Eggs streaked with blood: very common in young pullets just starting to lay, as the oviduct stretches and small capillaries tear. If the hen seems well and there's no blood around the vent itself, this typically resolves on its own.
Persistent soft-shelled eggs or repeated blood can point to a calcium shortfall or another underlying issue, so keep an eye on the pattern. For more on what's typical, see our guide to all your laying questions answered.
Chicken droppings: dark poop with a white cap
Normal, healthy chicken droppings vary in size by breed and shift in color with diet — greener after a day grazing grass, for example. The white "cap" on top is the urine portion, since birds don't pass liquid urine the way mammals do. If the droppings are well formed, all is well.
Cecal droppings: the smelly ones that look like diarrhea
Chickens have two cecal (see-kal) pouches as part of their digestive system, and they empty these a few times a day. Cecal droppings are slimy, mustard-to-brown in color, and notoriously smelly. Many keepers see them and worry their birds have diarrhea — but they're perfectly normal and nothing to be concerned about.
Worms
If chickens are kept on the same ground for a long stretch, they can pick up intestinal worms. There are several types, and some are large enough to spot with the naked eye in the droppings. Worms are a health matter rather than a quick DIY fix: if you suspect a worm burden, contact your vet or a qualified poultry specialist, who can confirm it and recommend the right course of action for your flock. Rotating ground and good coop hygiene help keep the risk down.
Lash egg (salpingitis): what it is and what to do
A lash egg isn't really an egg at all. Occasionally you'll find something "meaty" looking in the coop or run, often shaped a little like an egg. It can contain egg white, yolk, shell and membrane, ovarian material, blood and waxy pus, and it's caused by infection and inflammation in the hen's oviduct (a condition called salpingitis). Sometimes a hen passes the affected tissue and carries on, but a lash egg can signal something more serious and ongoing. Because it points to an internal infection, a lash egg is a clear sign to consult your vet or a qualified poultry specialist for assessment.
Vent gleet
Vent gleet is a yeast or fungal infection of the vent, similar to thrush, that can arise for many reasons. The tell-tale signs are wet-looking feathers below the vent, a pasty deposit around the area and a strong smell. Because it's an infection that can recur or signal an underlying imbalance, it's best handled with guidance from your vet or a qualified poultry specialist rather than guesswork. Keeping the coop clean and dry — and washing any eggs sensibly — supports recovery; our guide on whether you should wash eggs from your own flock is worth a read.
Prolapsed vent: a poultry emergency
Very occasionally a hen will strain to pass a large egg and her vent will prolapse, with a dark, bulbous mass protruding from her rear. It can also be linked to overweight older hens or young hens laying too early. A prolapse is a genuine emergency: flockmates are quick to peck at the exposed tissue, which bleeds easily and can quickly turn fatal. If you find a hen with a prolapse, separate her from the flock right away to protect her from pecking, keep her calm in a quiet space, and contact your vet or a qualified poultry specialist immediately for hands-on guidance — this is not a situation to manage alone.
Feather loss around the vent — is that normal too?
Bare patches near the vent aren't something that "comes out" of a hen, but keepers often notice them while checking this area. Some feather loss is a normal part of the annual molt, while other causes need attention. To tell the difference, see our guide to what's normal feather loss in chickens.
FAQ: what comes out of a chicken's vent
What can come out of a chicken besides eggs?
Through the vent, a hen passes droppings (including smelly cecal droppings with a white urate cap), and occasionally unusual eggs — soft-shelled, shell-less, double-yolked or tiny "fart" eggs. Less often you might find a lash egg, or see worms in the droppings or a prolapse, all of which warrant a vet's input.
Is a soft-shelled or shell-less egg normal?
The occasional soft-shell or shell-less egg is common, especially in new layers, older hens, hot weather or when calcium is low. A one-off is rarely a concern, but a steady run of them is worth raising with your vet or a qualified poultry specialist.
What is a lash egg and is it dangerous?
A lash egg is a firm, meaty mass of pus and reproductive tissue caused by an oviduct infection (salpingitis), not a true egg. It can signal a serious internal problem, so a lash egg is a clear cue to contact your vet or a qualified poultry specialist.
What should I do if my hen has a prolapsed vent?
Treat it as an emergency: separate the hen from the flock immediately to prevent pecking, keep her calm and quiet, and contact your vet or a qualified poultry specialist straight away for hands-on help.
Give your flock a clean, secure place to lay
Many of the issues above are easier to spot — and less likely to take hold — in a coop that's clean, dry and quick to inspect. Remember that the coop is your hens' bedroom: a snug, secure place to roost at night and lay by day, while the real living happens out in the run or yard. A dry, draft-free, easy-clean coop with the right number of nest boxes (about one box per three to four hens) helps you keep an eye on droppings, eggs and vents without a fuss. Nestera's recycled-plastic chicken coops wipe clean in minutes, resist red mites and rot, and have kept flocks healthy across the UK and Europe for nearly 20 years — a calm, comfortable home base for happy, well-monitored hens.
