Black droppings in chickens usually mean one of two things: your bird ate something dark-colored, or there’s internal bleeding somewhere in the upper digestive tract. The difference matters, because one is harmless and the other can be life-threatening. The quickest way to tell them apart is to look at what your chicken has been eating and whether the bird is acting sick.
Dark Foods That Turn Droppings Black
The most common and least worrying cause of black chicken poop is diet. Berries are the biggest culprit. Mulberries, blackberries, elderberries, and blueberries all produce dark, runny droppings that can look alarming. Backyard chicken keepers often notice this in late spring and summer when berry bushes ripen and free-ranging birds gorge on them. The droppings tend to be loose, stained dark purple or black, and sometimes splatter more than usual.
Other foods that can darken droppings include dark leafy greens (especially kale and purple cabbage), beets, and activated charcoal if you’ve added it to their feed as a supplement. If your chicken is eating normally, drinking water, walking around, and acting like herself, dark food is almost certainly the explanation. You can confirm this by restricting access to the suspected food for a day or two and watching whether the droppings return to normal shades of brown and green.
What Black Tarry Poop Actually Means
When black droppings aren’t caused by food, the likely explanation is digested blood, sometimes called melena. Blood that enters the digestive tract high up, in the crop, proventriculus (the stomach), or gizzard, gets broken down as it moves through the intestines. By the time it comes out, it’s no longer red. It looks black, sticky, and tarry, with a distinctly foul smell that’s different from normal chicken droppings.
This kind of bleeding can come from several sources. Hardware disease, where a chicken swallows a sharp object like a nail, staple, or piece of wire, can puncture or scrape the gizzard lining. Severe intestinal parasites can cause enough damage to bleed internally. Toxins from moldy feed (mycotoxins) can irritate and erode the digestive lining. In some cases, a tumor or ulcer in the upper gut is responsible, particularly in older hens.
The key difference from diet-related black poop is that the bird will almost always show other signs of illness. Look for lethargy, fluffed-up feathers, loss of appetite, difficulty walking, or a hunched posture. A chicken with internal bleeding significant enough to turn droppings black is a chicken that feels terrible and acts like it.
Coccidiosis and Parasitic Infections
Coccidiosis is one of the most common diseases in backyard flocks, caused by tiny parasites called Eimeria that attack the intestinal lining. Several species exist, and they cause different types of damage. Some strains target the cecum (the two pouches near the end of the intestine) and produce bloody or reddish droppings. Others attack higher in the gut, where the resulting blood has time to darken before it’s passed.
One particularly dangerous species, E. necatrix, causes severe damage to the mid-intestine and can produce lesions described as having a “salt and pepper” appearance, with white and black tissue visible in dead birds. E. tenella destroys the cecal lining and causes large hemorrhages. Infected chickens typically show ruffled feathers, drowsiness, decreased eating and drinking, and watery or occasionally bloody feces. Young birds between 3 and 12 weeks are most vulnerable, but adult chickens with weakened immunity can also develop serious infections.
If you suspect coccidiosis, a veterinarian or poultry lab can confirm it with a fecal float test. Treatment involves adding amprolium to the flock’s drinking water. The standard approach is to treat at a higher concentration for three to five days when the infection is first diagnosed, then step down to a lower maintenance dose for another one to two weeks. During treatment, the medicated water needs to be the only water source available so every bird gets an adequate dose. Amprolium is available at most farm supply stores without a prescription.
How to Tell Harmless From Dangerous
When you spot black droppings, run through a quick checklist. First, think about access to dark-colored foods. If your flock has been raiding a mulberry tree or you recently fed them beets, that’s your most likely answer. Second, watch the chicken’s behavior closely for 12 to 24 hours. A bird that’s eating, drinking, dust-bathing, and keeping up with the flock is almost certainly fine.
The signs that point to a real problem include:
- Tarry texture: droppings that are sticky and tar-like rather than just dark in color
- Foul odor: a metallic or unusually strong smell beyond normal chicken poop
- Behavioral changes: lethargy, standing hunched with eyes closed, isolating from the flock, or refusing food and water
- Pale comb and wattles: a sign of blood loss or anemia
- Difficulty walking: weakness in the legs combined with black stool suggests significant internal bleeding
- Pasty vent: droppings caked around the vent area, sometimes called “poop butt,” along with black stool
If your chicken has black tarry droppings plus any of these symptoms, the situation is urgent. Chronic bleeding in the gizzard or intestines mixes blood with stool and turns it black, and a bird in that condition can deteriorate quickly. Isolate the sick chicken in a warm, quiet space with easy access to food and water, and get a diagnosis as soon as possible. A fecal sample analyzed by a vet or poultry extension lab can identify parasites, while a physical exam can check for impacted foreign objects or other internal problems.
Normal Chicken Droppings vs. Black Poop
It helps to know what healthy droppings look like so you can spot changes early. Normal chicken poop ranges from brown to green, often with a white cap of urates (the chicken equivalent of urine). Cecal droppings, which chickens produce a few times a day, are darker, mustard-brown, and pudding-like, with a stronger smell. These are completely normal and sometimes get mistaken for something wrong.
Chickens also produce different-looking droppings overnight. The first morning poop is often larger, darker, and more pungent than daytime droppings because it’s been sitting in the intestines for hours. If you’re only noticing dark droppings first thing in the morning and they look normal the rest of the day, that’s typical. True black tarry stool will be consistently dark throughout the day, not just in one or two droppings.