Why is my chicken passing droppings with worms?
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Overview
If your chicken is passing droppings with worms, the most common cause is an intestinal worm burden. Sometimes people also mistake stringy mucus, undigested material, or the bird's own intestinal lining for worms, so it’s worth checking carefully before assuming the worst.
Worms in droppings can happen in chickens of any age, especially if they have access to soil, wet ground, wild bird droppings, or a crowded run. A single sighting doesn’t always tell you how serious it is, but it does mean the bird and the flock should be looked at properly.
Things To Check
1. Check whether the worms are actually moving, or whether the material could be mucus, feed fibres, or undigested plant matter.
2. Look at the droppings for changes in colour, smell, blood, or a sudden increase in looseness.
3. Check the chicken’s appetite, weight, and general energy level over the last few days.
4. Look for a dirty vent, straining, drooping wings, pale comb, or hunched posture.
5. Check the coop, run, litter, feeders and drinkers for dampness, build-up of droppings, or areas that are hard to keep clean.
6. Consider whether new birds, shared ground, or contact with wild birds could have increased exposure risk.
7. Note whether one bird is affected or several birds in the flock are showing similar signs.
Common Causes
The most common cause is a true intestinal worm burden, often picked up from contaminated ground, bedding, or shared areas. Roundworms are a frequent concern in chickens, and they may be noticed in droppings if the burden is heavier.
Sometimes the bird may pass mucus, lining material, or undigested feed that looks worm-like. This can happen with mild gut upset and is not always a sign of visible worms in the intestine.
Less commonly, a more significant gut problem or infection may be involved, especially if the chicken also seems unwell, stops eating, or has diarrhoea, weight loss, or blood in the droppings.
What To Do
Keep a close eye on the bird for the next 24 to 48 hours and note any changes in droppings, appetite, posture, and behaviour. If possible, separate the bird briefly so you can monitor droppings more easily without upsetting the rest of the flock.
Improve basic coop hygiene by removing soiled bedding, keeping drinkers and feeders clean, and reducing damp patches where droppings can build up. Good routine cleaning can make it easier to spot ongoing changes and may help support overall flock management.
If you are able to, collect a fresh droppings sample for worm testing or follow-up advice from your vet or poultry adviser. That can help you avoid guessing and may show whether worms are actually present.
Check the rest of the flock too, because worm problems often affect more than one bird. If several birds are affected, it usually points to a flock-level issue rather than a one-off odd dropping.
When To Contact A Vet
Speak to a vet if the chicken seems unwell, stops eating, loses weight, has blood in the droppings, or the problem is affecting several birds. You should also get advice if you are unsure whether the material is actually worms, because a proper assessment may be needed.
Products That May Help
Keeping on top of coop and run hygiene can be useful when you are monitoring droppings changes, as it supports a cleaner environment and makes flock checks more straightforward.
Related Questions
What do chicken worms look like in droppings?
Can chickens pass worms without seeming ill?
How often should I check my flock for worms?
Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.