FredsHens - that is a very good point.
I had the same experience with 5 Columbian Wyndottes (Ideal) to get some broody hens. Right from the start they were obviously from two different strains. Four didn't feather out till way way after the one had all its feathers. Going on seven weeks and no feathers, only their original chick down which wasn't adequate, looked like suede, not even wing feathers. But really beautifully shaped healthy dense full bodies. They looked like someone's project birds - heavily selected for appearance. The lone other one feathered out quickly and was flabby and no substance, felt like a feather duster to pick up, and had the ugliest head. Went broody immediately on beginning to lay though and only layed for a month between broody sessions.
From what I understand, hatcheries contract with surrounding private farms to supply eggs for hatching. So several farms may be supplying different strains to the hatchery.
But at least, adding the source after the breed will help narrow where birds are coming from.
Our chick supplier here in Alaska ordered from many hatcheries and would not tell which came from where. And I can't get anymore there anyway as he is out of business now. So it is ordering from the lower 48. No chicken shows here either, only the State Fair which is a micro show of chickens (half pet silkies) compared to any Fair in the lower 48.
Postage alone can be $40 for an order, let alone the chick price. Costs too much to just try chicks from several different hatcheires and breeders.