How many eggs does an ISA Brown lay a year?

Utah State Extension lists 300 to 320 eggs a year. The breeder's own commercial figures are higher, but they come from caged flocks over a long laying period, not backyard hens.

Are ISA Browns good for beginners?

Utah State calls the ISA Brown a consistent layer, great for beginners, with a calm, docile temperament.

Why do people say ISA Browns don't live long?

Utah State notes the trade-off of high egg yield but a shorter lifespan.

Is an ISA Brown a breed?

No. It's a commercial hybrid from the breeder ISA (Hendrix Genetics). Utah State labels it a hybrid, and the University of Maine lists it among breed and strain crosses.

What color eggs do ISA Browns lay?

Light brown, according to Utah State; the breeder simply calls it a brown egg layer.

How big is an ISA Brown?

The breeder gives a hen body weight of about 1,950 grams, roughly 4.3 lb. We didn't find a university figure.

ISA Brown

Hybrid: not an APA-recognized breed

A commercial hybrid layer from the breeder ISA: calm, beginner-friendly and a heavy brown-egg producer.

ISA Brown hens — Photo: Pengo, CC BY-SA 3.0, via Wikimedia Commons, cropped

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ISA Brown at a glance

Lightweight

Status: Not an APA breed: a commercial hybrid from Institut de Sélection Animale (Hendrix Genetics).[1][2][3]
Origin: Bred by crossing different lines; the breeder doesn't publish the parent lines.[1][3]
Egg color: Light brown (the breeder says brown)[1][3]
Eggs per year: 300–320[1]
Weight: About 4.3 lb hen (breeder's figure, 1,950 g).[3]
Temperament: Calm and docile, per Utah State. Utah State also notes the trade-off: high egg yield but a shorter lifespan.[1]
Good for beginners: Utah State calls it a consistent layer, great for beginners.[1]
How to spot one: Red-brown hens; no breed standard to match.[1][2]

Facts no source backs up are left out. Updated October 26, 2026 (how we check).

The ISA Brown is a commercial laying hen that has found its way into a lot of backyards. It's a hybrid bred by a poultry company to lay lots of brown eggs, and it does exactly that.

A commercial hybrid, not a breed

The ISA Brown comes from ISA (Institut de Sélection Animale), part of Hendrix Genetics. Utah State Extension labels it a hybrid and explains that hybrids are bred by crossing two or more different breeds or lines. The breeder doesn't publish the parent lines. The University of Maine lists the ISA Brown among breed and strain crosses, and there's no ISA Brown on the American Poultry Association's breed list.

Eggs

Utah State lists the ISA Brown at 300 to 320 light brown eggs a year and calls it "a consistent layer." The breeder describes it as "the efficient brown egg layer" and publishes much higher totals, but those are commercial figures from caged flocks over a long laying period, not backyard numbers.

See what yours really lay in our free Egg Log. Time their first eggs with the Laying Calculator.

Temperament

Utah State describes ISA Browns as "calm, docile" and "great for beginners." Poultry Extension says commercial egg-laying breeds in general tend to be flighty and high-strung, but Utah State's note is about the ISA Brown specifically, so we go with it.

The trade-off: a shorter life

Utah State is upfront: the ISA Brown offers "high egg yield but shorter lifespan." If you want hens that keep you company for many years, a heritage breed may suit you better; if you want eggs now, the ISA Brown delivers.

Size

The breeder gives a hen body weight of about 1,950 grams, roughly 4.3 lb. We haven't found a university figure.

What sources don't say

We found no extension source on ISA Brown broodiness, cold or heat hardiness, or a standard look. The breeder says only that the bird adapts well to different climates.

How to recognize an ISA Brown

There's no breed standard. ISA Browns are red-brown hens, so the seller's label is the main way to know you have one.

Is an ISA Brown right for you?

Choose ISA Browns for maximum brown eggs and an easy-going hen, knowing they may not live as long. For a similar egg machine, compare the Red Sex Link; for a longer-lived heritage layer, try the Rhode Island Red.

Compare egg colors on our free Egg Color Chart printable.