Jersey Giant: The Biggest Purebred Chicken
TL;DR: The Jersey Giant is the largest purebred chicken, bred in New Jersey in the late 1800s to put a chicken on the table where a turkey would go. It comes in Black, White and Blue, lays large brown eggs, and is calm for its size. It lost commercially because it grows slowly — months, not weeks — which is exactly why it is a heritage bird today rather than a meat industry standard. In a Philippine backyard it is a project bird: impressive, manageable, and demanding on housing because of the heat.
Every so often a breed exists because someone had an ambitious idea rather than a market. The Jersey Giant is that: an attempt to breed a chicken big enough to replace the roast turkey, which worked biologically and failed economically.
What Is a Jersey Giant?
An American breed developed in Burlington County, New Jersey, in the late 1800s, from crosses of large Asiatic-type stock. The goal was explicit — a very large table fowl — and the result is recognised as the largest purebred chicken breed.
Three recognised varieties:
| Variety | Notes |
|---|---|
| Black | The original and still the most common; beetle-green sheen on the plumage in good light |
| White | Developed later from sports of the Black |
| Blue | Slate-blue laced plumage; as with all blue poultry, colour does not breed true in a simple way |
The build is what you notice first: a deep, broad, upright bird with a long back and heavy bone. Legs are dark in the Black variety with yellow foot soles — a detail breeders check against the standard.
Why Did the Jersey Giant Lose to the Broiler?
Time. A Jersey Giant takes many months to fill out its frame, while a modern commercial broiler reaches market weight in roughly six weeks.
That difference is the entire commercial story. Meat production economics are governed by how much feed goes in per kilo of meat that comes out, and a bird that eats for six months to reach a weight another bird reaches in six weeks loses that comparison badly, no matter how big it eventually gets. Our broiler feed conversion ratio guide explains why that number decides everything in meat production.
So the breed ended up where slow-growing heritage breeds always end up: with hobbyists, homesteaders and exhibition breeders, who are optimising for something other than cost per kilo.
For a backyard keeper, that trade-off can still be worth making — a bird you keep for years, breed from, and eventually eat is a different proposition from a six-week grow-out. But go in knowing it: if you want meat efficiently, our broiler chicken breeds guide is the honest place to look, and broiler vs native vs layer compares the three approaches directly.
Does It Lay?
Yes, usefully — large brown eggs, at a rate that is respectable for a heavy breed rather than competitive with a layer hybrid.
That is unusual. Most heavy meat-type birds are poor layers, so a Jersey Giant hen that keeps producing large eggs while carrying that much body is a genuine dual-purpose proposition. She will not out-lay a Lohmann Brown or a Leghorn type, and pretending otherwise would be silly.
One practical note for anyone hatching: eggs from a giant breed are large, and large eggs behave slightly differently in an incubator — see incubator temperature for chicken eggs and incubator humidity, week by week for the settings, and expect the breed’s chicks to take their time. A slow-growing breed is slow from the start.
What Does a Giant Breed Need in Philippine Conditions?
More space, more airflow, and stronger structures than you would build for a light breed.
Body size works against a bird in the tropics: more mass generating heat, more feathering holding it in. A Jersey Giant is at the extreme end of that. Practical consequences:
- Space per bird goes up, not down. The figures in our coop space per bird guide are minimums for ordinary birds; a giant breed needs the generous end of the range.
- Perches must be low and solid. A very heavy bird landing from a high perch risks foot injury, which is one of the routes into bumblefoot. Low, wide, sturdy perches.
- Ventilation matters more than shade alone. See coop ventilation.
- Heat management is the daily job. Our keeping chickens cool in Philippine heat and heat stress in chickens guides apply with extra force here.
Feeding follows the same logic as any slow-growing heavy breed: a grower ration for far longer than a broiler gets one, then a layer ration for hens in production. Our what to feed chickens at every life stage guide sets out the stages, and how much feed does a chicken eat per day covers the budgeting question a big bird raises immediately.
Is It Worth Keeping Here?
As a project or a breeding flock, yes. As a way to produce meat cheaply, no.
Be honest about which you are doing. A Jersey Giant is:
- Slow. Months of feed before the bird is what you wanted.
- Expensive to feed to size. Big birds eat like big birds.
- Hobbyist-sourced. Availability here is through private breeders and poultry groups, not hatcheries.
- Impressive and calm. Which, for a keeper who enjoys the birds rather than only the output, is a legitimate reason.
We are not quoting Philippine prices for stock. Rare-breed pricing is set bird by bird by the breeder and any figure written here would mislead. Ask directly, and see our where to buy day-old chicks guide for what to check first.
The Honest Limits Here
Breed origin, purpose and the recognised varieties are documented in poultry breed standards. This guide states no mature weight, no lay-rate figure and no Philippine price, because those vary with bloodline, feeding and seller, and an invented number is worse than an honest omission. If a specific weight matters to your plan, ask the breeder what their own birds actually reach and at what age.
For the practical comparison, see broiler vs native vs layer and chicken breeds in the Philippines. For the other heavy breeds worth a look, see Brahma and Sussex.
Frequently Asked Questions
What is a Jersey Giant chicken?
An American breed developed in Burlington County, New Jersey in the late 1800s, bred deliberately as a large table bird to compete with turkey. It is recognised as the largest purebred chicken breed.
What colours do Jersey Giants come in?
Black, White and Blue are the recognised varieties. Black was the original and is still the most common.
Why are Jersey Giants not used commercially for meat?
Because they grow slowly. A commercial broiler reaches market weight in roughly six weeks; a Jersey Giant needs many months to fill out its frame. That feed cost per kilo of meat is why the breed lost to purpose-bred broilers and survives as a heritage and hobby bird.
Do Jersey Giants lay well?
They are respectable brown-egg layers for a heavy breed, and the eggs are large. They will not match a commercial layer hybrid, but a heavy meat-type bird that also lays usefully is unusual.
Are Jersey Giants good in hot weather?
They are a large-bodied, fully feathered breed developed in a temperate climate, so heat is the main challenge in keeping them here. Shade, ventilation, low stocking density and cool water are not optional for a bird this size.
Are Jersey Giants friendly?
The breed is generally described as calm and docile for its size, which is part of its appeal. A big, placid bird is easier to live with than a small flighty one.
Can I get Jersey Giants in the Philippines?
They are a hobbyist breed here, sourced through private breeders and poultry groups rather than commercial hatcheries. Expect limited availability.