Red Sex-Link chickens are a breed of hybrid chicken, created by crossing two different breeds of chickens. This is done so to achieve prolific genetics from both sides of the parent stock, which gives the hybrid a high-yield laying ability imbedded within their genes. This feat of extraordinary laying ability otherwise wouldn’t be possible within the standard parent breeds respectively without the genetics involved in the crossing process.  In stating this, Red Sex-Links cannot be created by breeding two of them together. For example, a rooster and hen Sex-Link would not create the same type of Red Sex-Link that the parents are. This is the case as the Red Sex-Link is a hybrid breed, so the resulting offspring would not inherit the same powerful laying traits that their parents had, and would be lost. You can, however, create your own Red Sex-Links by breeding a red rooster over a white or silver-factor hen. This will produce chicks that are sexable upon hatch. I.e., crossing a Rhode Island Red rooster to a Rhode Island White hen can produce Red-Sex Links. The pullets will be reddish brown, while the roosters will be white to light beige. The name Sex-Link implies that the chicks can be sexed by color. I.e., Red Sex-Link chick pullets are reddish in color with dark markings on their back when hatched, while cockerels will be white or light beige. This allows for ease of sexing chicks from day 1 without having to vent sex the chicks.