Laying hen breeds — Leghorn, Rhode Island Red, Sussex and hybrids
Want to know which hen will lay more eggs and whether it is worth keeping a pure breed or a hybrid? We explain in plain language how Leghorn differs from Rhode Island Red, and what separates a pure breed from a laying hybrid such as ISA Brown or Lohmann.
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Pure breed vs hybrid — what is the difference?
Before looking at specific breeds, it is worth explaining two terms that come up in every conversation about laying hens. A pure breed means birds of the same, generations-old breed — the keeper knows how they will look, how they will lay and what traits they will pass on. A hybrid (also called a cross or a crossbred) is a hen bred from two or more selected lines deliberately matched for one goal — as many eggs as possible at the lowest feed cost. A laying hybrid will usually lay more eggs and more evenly than a pure breed, but its offspring lose those advantages — which is why farmers buy fresh day-old chicks from a hatchery each year instead of breeding their own replacement stock.
What determines egg colour?
Shell colour depends on the breed or hybrid, not on whether the egg is "healthier" or "tastier". Hens with white earlobes (e.g. Leghorn) lay white eggs. Hens with red earlobes (e.g. Rhode Island Red, Sussex and most brown hybrids) lay brown or cream eggs. This is a hereditary trait — egg producers choose shell colour to match market preferences, not egg quality. Inside, a white egg and a brown egg are identical — only the shell colour differs.
Which hen suits a small farm?
On a small backyard or small-scale farm (up to a few hundred birds) the most reliable choices tend to be calm, hardy breeds: Sussex, Rhode Island Red or a light brown hybrid. In commercial production of several thousand birds and more, hybrids are almost always used — ISA Brown, Lohmann Brown, Hy-Line Brown or their white equivalents — because they give a uniform flock, predictable laying performance and lower feed consumption. The full guide to running a laying hen farm is available at laying hen farming.
Leghorn, Rhode Island Red and Sussex — what sets them apart
Three of the most widespread pure breeds used in laying and dual-purpose production. Each has different strengths.
Leghorn (Italian Leghorn)
The Leghorn is a light hen with white plumage and yellow legs, originally from Italy. It lays a lot of white eggs — approximately 250–300 per year depending on the line. It is active and lively, does well in free-range conditions but is not particularly docile. The Leghorn is the genetic foundation of many commercial white hybrids — if you buy white eggs in a shop, they were almost certainly laid by a hen with Leghorn ancestry. Feed guidelines for laying hens are covered in the guide laying hen nutrition — standards.
Rhode Island Red
The Rhode Island Red is a medium-weight hen with dark red, mahogany plumage. It lays brown eggs — approximately 200–260 per year depending on the line and conditions. It is hardy, calm and manages well in more demanding housing conditions. It is often described as a dual-purpose breed, because in addition to good laying performance the cockerels and surplus pullets also grow into decent carcasses. It is one of the breeds from which most popular brown laying hybrids were developed. How to recognise a good laying hen — read how to recognise a good laying hen.
Sussex
The Sussex is a calm, heavy breed with white plumage marked with black flight feathers and a collar (in the ermine variety). It lays cream-brown eggs — approximately 200–250 per year. Well regarded in small backyard flocks for its gentle temperament and good adaptation to free-range runs. Like the Rhode Island Red it is often used as a dual-purpose breed, growing reasonably well for meat while providing decent laying performance. Native breeds similar to Sussex are described at Polish native chicken breeds.
ISA Brown, Lohmann, Hy-Line, Bovans — commercial hybrids
Commercial production is dominated by hybrids, purpose-bred for one goal: the maximum number of eggs at the lowest feed cost.
ISA Brown
ISA Brown is one of the most popular brown laying hybrids in the world, developed by ISA (Institut de Sélection Animale) in France. It lays brown eggs — approximately 300–320 per year under good conditions. It is calm and stress-tolerant, performing well in both cage and floor systems. Hens of this type are the "standard" on many commercial farms.
Lohmann Brown and Lohmann LSL
Lohmann hybrids were developed in Germany by Lohmann Tierzucht. Lohmann Brown lays brown eggs — approximately 300–315 per year. Lohmann LSL (Lohmann Selected Leghorn) is a white hybrid that lays white eggs, lighter bodied and with lower feed requirements — popular where feed conversion ratio matters most. Both lines are widely used across Europe, including Poland.
Hy-Line
Hy-Line hybrids come from the American company Hy-Line International. Hy-Line Brown (brown eggs) and Hy-Line W-36 (white eggs) are among the most widely used commercial laying hens in the world. They stand out for consistent egg weight and stable laying performance throughout the production cycle — approximately 300–320 eggs per year depending on the line.
Bovans
Bovans hybrids are produced by Hendrix Genetics — Bovans Brown (brown eggs) and Bovans White (white eggs). They are valued for good results in floor and free-range systems where activity and hardiness matter. The company publishes detailed laying performance figures in its breed catalogues (available on its website), which should be treated as indicative — actual results depend on real farm conditions.
Pure breed or hybrid — which to choose?
A pure breed offers breeding value, hardiness built up over generations and the ability to breed your own replacement stock — but it will lay fewer eggs and the flock will be less uniform. A hybrid lays more eggs, more evenly and at lower feed cost — but its offspring do not inherit those traits, so stock must be renewed. For a small backyard flock and preserving tradition — a pure breed. For commercial egg production — a hybrid. How an egg is formed and what determines its quality is explained in how an egg is made.
Frequently asked questions about laying hen breeds
Which hen lays the most eggs?add
In commercial production the highest yields come from laying hybrids: ISA Brown, Lohmann Brown, Hy-Line Brown and their white counterparts — approximately 300 or more eggs per year under good conditions. Among pure breeds, the Leghorn has the highest laying capacity — approximately 250–300 white eggs per year. Rhode Island Red and Sussex lay less — around 200–260 per year — but are more dual-purpose. Remember that these figures are indicative: actual laying performance depends on housing conditions, feed and the lighting programme.
Why are some eggs white and others brown?add
Shell colour depends on the breed or hybrid — it is a hereditary trait. Hens with white earlobes (e.g. Leghorn) lay white eggs. Hens with red earlobes (e.g. Rhode Island Red, Sussex, ISA Brown) lay brown or cream eggs. Shell colour has no effect on quality, taste or nutritional value — inside the eggs are identical.
What is the difference between a pure breed and a hybrid?add
A pure breed means birds of the same, established breed — the keeper can breed them and the offspring will retain the parents' traits. A hybrid is a cross of two or more selected breeding lines, purpose-bred for a specific goal (e.g. high egg yield). A hybrid lays more eggs, more evenly than a pure breed, but its offspring lose those advantages — which is why commercial farms buy fresh chicks from a certified hatchery each year.
Is ISA Brown a breed or a hybrid?add
ISA Brown is a laying hybrid (a crossbred), not a pure breed. It was developed by the company ISA from selected breeding lines and is a proprietary commercial product — you cannot breed it yourself and retain the same performance. The offspring of an ISA Brown hen will not have the same traits as its mother.
How much feed does a laying hen need per day?add
Approximately 110–130 g of feed per day, depending on breed, body weight, laying rate and house temperature. Light (white) hybrids consume slightly less than brown hybrids. Detailed standards and feed consumption tables are covered in the guide laying hen nutrition — standards.
Is Rhode Island Red suitable for a small backyard flock?add
Yes — Rhode Island Red is a good choice for a small flock. It is calm, hardy and dual-purpose: it lays brown eggs (approximately 200–260 per year) and its young also grow into decent carcasses. It handles a range of conditions well. It is one of the breeds recommended for keepers who want both eggs and meat.
Run your laying hen farm in one place with DlaFerm.pl
Keeping Leghorns, Rhode Island Reds or commercial hybrids? We will show you how DlaFerm.pl simplifies flock records, laying performance tracking and treatment documentation. Write to us.
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