To clear up why there was a little confusion, Production reds are a 'true breed' in the sense that they produce offspring that is the same as the previous generation. However, they are sometimes a hybrid in the same way an Easter Egger is, in the fact that some hatcheries produce them by using multiple breeds and they do not have a SOP. Though some hatcheries use solely RIR blood to produce them. Because there is no Standard of Perfection, any hatchery can label any red bird a "Production Red."https://www.purelypoultry.com/blog/...tween-production-reds-and-sex-linked-hybrids/
This website link above seems to say that Production Reds are a true breed in which case they would breed more of their own kind. If I had these birds, I would know what they're going to look like when bred.
I think you thought, as I did at first, that Production Reds are a hybrid. The link I posted says they are a true breed. So that's cleared up, unless the website is wrong, then so am I.
Your "brown hybrid layers" can always be called "Red Sex-linked Chickens" because they are easy to sex at hatching by their down color. This includes Red Stars, Golden Comets, Cinnamon Queens, Golden Buffs, and any other names that Red Sex-linked Chickens are marketed under.
Hope that clears things up for you.
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