Why are my chicken droppings black and tarry? | arlo.® Atlas
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Overview
Black, tarry droppings in chickens can be caused by something as simple as diet, but they can also happen when a bird is passing digested blood or if droppings are affected by what they’ve eaten. If it happens once and the bird otherwise seems bright, it may be worth watching closely. If it keeps happening, or your chicken seems unwell, it needs a proper look.
Things To Check
1. Check whether it was a one-off dropping or whether several birds are passing the same type of muck.
2. Look at the bird’s behaviour. Is it eating, drinking, perching and moving about as usual?
3. Check for other signs such as fluffed-up feathers, drooping wings, pale comb, reduced appetite or वजन loss.
4. Look at what they’ve eaten recently, including treats, dark greens, beetroot, berries or anything unusual from the run.
5. Examine the dropping closely if you can. Is it truly tarry and sticky, or just dark with a normal droppings shape?
6. Check the coop and run for obvious issues such as damp bedding, mouldy feed, stress, bullying or signs of worm burden.
7. If you have more than one bird, compare the droppings from the rest of the flock to see whether this looks like an individual issue or a wider pattern.
Common Causes
The most common reason is simply darker faeces after certain foods, especially strong-coloured treats or a change in diet. Droppings can also look black when they’re older or more concentrated.
Another common reason is that chickens sometimes pass cecal droppings, which are usually darker, wetter and smellier than normal. These are part of normal digestion and can look alarming if you’re not expecting them.
If the droppings are truly black and tarry, that can sometimes suggest digested blood, which may happen with irritation or bleeding higher up in the digestive tract. Internal parasites, gut irritation or other digestive problems can be involved, but you can’t tell the exact cause just from the droppings alone.
Less commonly, black droppings may be linked with a chicken that is generally unwell and not passing food normally. That’s why the bird’s overall condition matters as much as the dropping itself.
What To Do
Start by checking the bird carefully and keeping an eye on whether the droppings return to normal over the next day or so. Make a note of any changes in appetite, energy, comb colour and egg laying, if relevant.
Offer a clean, dry environment, fresh water and a sensible balanced diet. If you’ve recently given rich treats or changed feed, keep things simple for a short period and see whether the droppings settle.
It’s also worth checking the rest of the flock and the coop, because a wider pattern can point towards a management issue rather than a problem in one bird alone.
If the black, tarry droppings keep happening, or the bird seems dull, off colour or unwell, it’s sensible to get veterinary advice rather than waiting and hoping it clears on its own.
When To Contact A Vet
Contact your vet promptly if the black, tarry droppings continue, if more than one bird is affected, or if the chicken seems weak, pale, not eating, or otherwise unwell. Bloody or tarry droppings can sometimes be a sign of a more serious digestive problem, and chickens can go downhill quickly if they stop eating.
Products That May Help
If you’re managing a flock, keeping the coop and surrounding areas clean and easy to check can make day-to-day monitoring simpler. The Poultry & Smallholding collection may be useful as part of that routine.
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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.