Most hatcheries are open to the fact that they get their eggs from a breeder flock, multiple breeder flocks, almost every breed comes from its own breeder flock that is owned by different people. Hatcheries only ever see day old chicks, they visit the breeder flocks once a year for a check up, not including when they come to get the eggs because they don't look at the birds when they come to get eggs, also most breeder flocks just ship eggs to the hatcheries now. Hatcheries do not control which birds get to breed, that is up to the owner of the flock, as long as they are producing recognizable birds then it is ok. This is what my great uncle told me, he owned a breeding flock of true RIRs nearly 30 years ago for McMurray. I guess this is why some birds look decent and others don't, some owners do some culling to make their birds look better.