A hybrid bird is an f1. That is: its parents were from two different standardised breeds. It does not matter the intention of the breeding, the offspring from a crossing is an f1,l from different parent stock, and therefore by definition a hybrid.
I disagree:
“Hybrids Fueled the Modern Poultry Industry
During the Twentieth Century scientific breeding revolutionized poultry. College educated geneticists created modern hybrids with the intent to create strains of birds especially efficient in converting feed into eggs or meat. Probably the best known is the Cornish Rock hybrid, developed from the Cornish and Rock breeds.
Prior to the development of hybrid meat strains, chicken was a relatively expensive meat produced by slow growing Light Brahmas, Jersey Giants, New Hampshires and other breeds.
It took much feed and time for these birds to grow to market size, thus making chicken an expensive meat enjoyed mostly on special occasions. The Cornish Rock changed it all.
This hybrid produces an eating size bird in half the time on much less feed than the old timers. Credit hybridization with precipitously dropping the price of chicken in the grocery store or on a restaurant menu.
Today the average American eats about 60 pounds of chicken meat a year.
Scientists also created hybrid egg layers capable of producing upwards of 300 eggs a year. Among the best-known laying hybrids are California Whites, a Leghorn based white egg layer, and the ISA Brown, a complex hybrid that is an amazingly efficient producer of brown eggs.
Hybridization is often not as simple as crossing one breed with another. Sometimes complex series of matings over multiple generations are required to develop sophisticated highly productive birds.
How About Crossbreeds of Chickens
According to Dr. Lamont, crossbreeding technically refers to mating two or more breeds. The intent to improve traits is usually not a defining factor. Crossbreeding results in chickens that do not breed true and are not registered by the APA.
“In the early days, around 200 years ago, cross breeding was used to introduce a visible trait, like barring (on the feathers) that helped identify sexes at hatching,” she said.
Today this is common with hybrid strains where females and males have different colored feathers or patterns. It’s a much faster way to separate the gender of baby chicks than vent sexing, which must be used with most chicken breeds.
In vent sexing a highly skilled and experienced hatchery worker gently squeezes the bird’s vent, revealing slight differences between males and females.
Few people enjoying a small flock of backyard chickens keep roosters or have any interest in breeding their birds. For them it doesn’t really matter if they own registered breeds, hybrids, or crossbreeds.
Families can pick and choose their chicks based on the traits they like the most. Hybrid layers often are the most efficient at producing the maximum number of eggs, but many true breeds also lay well and connect their owner with the glory days of poultry when attending chicken shows was a passion.
Many hatcheries allow customers to order a diversity of chicks, making it easy for a customer to order a diversity of breeds and hybrids.”
https://www.scoopfromthecoop.com/breeds-hybrids-crossbreeds-just-what-are-they/
source: Nutrena feed
Most hybrids are crossbreeds, not all crossbreeds are hybrids.
And I say most are crossbreeds, because Cornish Cross are actually the offspring of two strains of the same “breed” crossed together yet they are still considered hybrids.
Also to note the term hybrid was never adopted to replace “crossbred.” Crossbred was already a term. But hybrid really means the offspring of two species, yet they needed a distinctive term for birds that were the F1s of two inbred strains that were used for meat or eggs.
Designer breeds is the term used for crossbreeds or their offspring that are marketed on egg color or aesthetics. (Showgirl, Favacauna, Midnight Marans). Sometimes they are intentionally made into sexlinks for the convenience of the hatchery.
