What the chicks of a Cochin and a Jersey Giant look like and lay, worked out from both breeds' standards.
A Cochin hen crossed with a Jersey Giant rooster gives you what keepers call a first-generation (F1) cross. The pullets should lay brown eggs: there is no blue gene in this cross. Every chick gets a single comb. Expect a giant bird, a fair layer, hand-tame, the average of the two parents.
Preset to a Cochin hen and a Jersey Giant rooster. Change either side to see how the blue gene and the brown coat move the shell colour.
He never lays, so his blue gene is read from his mother's eggs.
Too uncertain to call: 0–100% blue-based (Olive if it is, otherwise Brown). Add lineage to narrow it.
Brown shade shifts with a hen's age, diet and stress, so identical genes still lay a little differently. Speckling and bloom are cosmetic and not modelled.
| Trait | Cochin hen | Jersey Giant rooster | Chicks |
|---|---|---|---|
| Comb type | Single | Single | Single |
| Barring | Not barred | Not barred | Not barred |
| Fibromelanosis | Absent | Absent | Absent |
| Skin color | Yellow | Yellow | Yellow |
| Leg color | Yellow | Black | varies: polygenic, parents differ |
| Trait | Cochin | Jersey Giant | Chicks |
|---|---|---|---|
| Frame height | large | giant | giant |
| Egg production | light layer | fair layer | fair layer |
| Broodiness | very broody | rarely broody | often broody |
| Docility | hand-tame | calm | hand-tame |
| Bone density | heavy | heavy | heavy |
| Foraging skill | fair forager | decent forager | decent forager |
| Cold hardiness | very cold-hardy | very cold-hardy | very cold-hardy |
Chicks land near the average of the two parents for these traits. Reaching one parent's extreme takes another generation of selection.
This is the breed-standard version. Add your flock, set a breeding goal, and the pairing engine ranks every hen and rooster you own against it. Free for up to 15 birds.
Checked September 2026. Hybrids and breeds no reference covers are marked approximate. Egg colour on these pages follows one rule: Brown is any shade a buyer would call brown; Cream/tinted is off-white.