I just found this thread, so I know I'm responding to older posts. But I did read it all, and I didn't notice anyone else saying what I intend to say
The project birds do well all year minus getting a little hot...the pure orpingtons and other cold-hardy breeds thrive in the cold but as soon as those 95+ degrees days hit, they sit in the barn, lose weight, and basically inhale water to keep cool. I’d like to reduce the feathering on the projects a little more but not so much that they start getting chilled when it gets cold.
One way to reduce the feathering, increase the meat, and maintain the pea comb: add hatchery-quality Dark Cornish. Not Cornish Cross that grow so fast, not the show-quality Cornish that are wider than they are tall. The Dark Cornish I've had were from McMurray Hatchery and Ideal Poultry. They had pea combs, enough feathers for warmth but not a lot of extra fluff, clean legs, feather patterns that I liked, were fairly good layers-- basically a dual-purpose bird that was a little more compact than most and has the pea comb.
I need to get some more color in somehow because my main chickens in the main project line are either solid black or solid white with maybe two or three tiny black spots randomly placed somewhere on their neck or back. Some are solid white. The parent hens were black but where the solid white came from I have ZERO clue. I don’t own a single white chicken on the farm. I’m not good with genetics but is that a recessive white gene? It’s weird because majority (probably 70%) of the chicks have been white.
The white came from your Buff Laced Brahma rooster. He had white lacing on buff. That means he had the Dominant White gene that turns black into white.
So the chicks were black (because of the Extended Black gene from their black mothers), and then all the black was turned white by the Dominant White gene.
They’ve all become excellent foragers and have taken 100 degree days and daily thunderstorms with stride. The only downside is they have feathered legs and aren’t very meaty. They’re also really slow feathering. The 4 month old roosters still have chick down on their back and haven’t grown in any tail feathers. The 5 month old roo didn’t start growing tail feathers until two weeks ago. I know given their size they’re going to be very slow maturing.
Sounds like they're coming along pretty well!
Slow vs. fast feathering is controlled by one gene, and that gene is on the Z (sex) chromosome. Slow is dominant, so it cannot hide and pop up again later.
The simplest way to get rid of slow feathering is if you can use a fast-feathering male next year. All of his daughters will have fast feathering, and some of his sons probably will as well. (Any sons who feather slowly will carry the fast feathering gene, and can pass it to half of their chicks.)
Those Liege chicks look nice! And I see they have many of the same qualities that I found in Dark Cornish (pea comb, close feathering, compact body, patterned feathers. Looks like they feathered out fast, too.) So I can see why you've decided to cross them in to your mix!