In chickens, “barred” describes a feather pattern of alternating light and dark stripes running horizontally across each feather. When you look at a barred chicken, the overall effect is a bird covered in neat, parallel bands of color, typically black and white. It’s one of the most recognizable plumage patterns in poultry, and understanding how it works can help you identify breeds, select breeding stock, and distinguish it from similar-looking patterns.
What the Pattern Looks Like
Each individual feather on a barred chicken has distinct horizontal bands that alternate between a dark color (usually black) and a lighter color (white or sometimes yellowish). The bars run perpendicular to the feather shaft, stacking from base to tip. When these patterned feathers overlap across the bird’s body, they create the characteristic striped appearance that gives breeds like the Barred Plymouth Rock their iconic look.
The lighter bands can vary depending on the bird’s other genetics. In some chickens, the non-black bars appear crisp white. In others, the lighter bars have a yellowish or golden tint because of a pigment called pheomelanin. Birds that carry a gene suppressing that warm pigment end up with cleaner black-and-white contrast.
Two Types of Barring
There are actually two genetically distinct forms of barring in chickens, and they work in opposite ways.
Sex-linked barring is the more common and well-known type. It’s controlled by a gene on the Z chromosome (the chicken equivalent of a sex chromosome) and works by adding white bars onto a pigmented background. The gene causes pigment-producing cells in the developing feather to die prematurely in certain zones, leaving those sections unpigmented. This is the type of barring you see in Barred Plymouth Rocks and most other familiar barred breeds.
Autosomal barring is less common and works the other way around: it adds dark bars onto a lighter background. In this case, the pigment cells remain alive in both the dark and light regions of the feather, but pigment production switches on and off as the feather grows. This pattern appears in breeds like the Fayoumi.
Barred vs. Cuckoo
If you’ve spent any time looking at chicken breeds, you’ve probably noticed that some birds labeled “cuckoo” look a lot like barred birds. The underlying gene is the same, but the visual result differs. In the United States, “barred” refers to plumage with clean, sharp, well-defined lines. “Cuckoo” describes a softer, fuzzier version where the edges of the bars blur together and the overall pattern looks murkier or less even.
The difference comes down to feather growth rate. Slow-feathering birds grow their feathers at a pace that allows the pigmented and unpigmented zones to develop evenly across the feather, producing crisp, parallel bars. Fast-feathering birds grow their feathers more quickly, which offsets those zones and creates the diffused, less distinct cuckoo look. A good comparison: Barred Plymouth Rocks have sharp, well-defined stripes, while Dominiques have softer, less precise banding.
Gene dosage also plays a role. Because the barring gene (designated B) sits on the Z chromosome, roosters can carry either one or two copies, while hens carry only one. Males with two copies of the barring gene tend to have crisper, more defined bars and often appear lighter overall, since more of each feather is unpigmented. Males with a single copy, and all females, show slightly less intense barring.
Common Barred Breeds
The Barred Plymouth Rock is the breed most people picture when they think of barred chickens. It’s a dual-purpose bird with bold black-and-white stripes and one of the most popular backyard breeds in the country. But it’s far from the only barred chicken. Dominiques, one of America’s oldest breeds, carry the same barring gene but display the softer cuckoo version of the pattern. Cuckoo Marans, known for their dark brown eggs, also show barring, though again with less definition than the Plymouth Rock. Grey Broilers used in commercial production carry barred plumage as well.
Not every black-and-white striped chicken is a Barred Rock. The barring gene can appear in crosses and mixed-breed flocks, so identifying a bird as a specific breed requires looking at other traits like body shape, comb type, and leg color alongside the feather pattern.
Breeding for Clean Barring
If you’re raising barred chickens and want to maintain or improve the sharpness of the pattern, there are a few practical things to keep in mind. The crispness of barring is influenced by both the number of barring gene copies and the feather growth rate. Breeding a barred rooster to barred hens is the most straightforward way to produce well-barred offspring, since this maximizes the chance of chicks inheriting the gene from both parents (in the case of males).
Some breeders cross a barred or cuckoo rooster with solid black hens to introduce fresh genetics, but this produces chicks with only one copy of the barring gene, which can dilute the pattern’s intensity. If you go this route, the next generation typically needs to be bred back to a barred bird to recover double-gene males with sharper lines. Mixing single-gene and double-gene lines too freely can make it harder to maintain consistent, clean barring across your flock.
If your goal is sharp barring specifically, selecting for slow feathering alongside the barring gene will give you the most defined pattern. Birds that feather out quickly as chicks are more likely to develop the diffused cuckoo look rather than true crisp bars.