v.intr.
To mate so as to produce a hybrid; interbreed.
n.
An organism produced by mating of individuals of different varieties or breeds.
Crossbreed
Verb
To produce a hybrid animal or plant by breeding two animals or two plants of different species or varieties. For example, crossbreeding a...
Sex links and Cornish X are not "cross-bred chickens." They're intentional hybrids, and it's not like they're trying to fool you that it's a purebred chicken. Heck, the name Cornish X tells you in the name that it's a hybrid and the description of the sex-links in the catalog acknowledges that...
You're not going to get a cross from a major hatchery. It might not be a good quality specimen, but it will be what they say it is. A hatchery wouldn't survive if they sent out random crosses instead of the breed you paid for.
What hatchery? I order from MMM and I've gotten a lot of different...