i want the color pattern of the barnevelder for sure also as i said this isnt a full list this was a draft if you want you could try to make a better one.
and honestly i could use the help
My inclination would be to figure out the first cross, and what traits you expect to see in the chicks. Decide what to select. Decide whether to cross them to each other (try to get some that will breed true for certain traits), or whether to breed to something else. Figure out what that next generation is likely to produce, what to select, and so forth.
Starting from your first cross:
What color Cochin? It makes a difference in the outcome.
You could choose a color that is most similar to what you want to end up with. Laced or Partridge might be good. Or you could choose a color that is different, but in a way that is easy to breed out. Solid black will mostly be caused by dominant genes, so it is relatively easy to get rid of. Other colors bring other considerations.
Cochin crossed to Barnevelder, each chick will have one gene from each parent for each trait. So the chicks will be fairly similar to each other. Hatch a few, pick the best ones to use for the next generation.
When you cross those CB chicks back to Barnevelder, you will get chicks that are about 3/4 Barnevelder, but the individual chicks could be quite different from each other.
Coloring: a few may have the proper Barnevelder coloring (they inherited all the "Barnevelder" color genes from their F1 parent, plus the ones from the Barnevelder). A few may have the same color as the F1 chicks (they inherited all the "Cochin" color genes from the F1 parent, and of course their other parent was the Barnevelder). Most will probably have something in between, with one set of genes from their Barnevelder parent, and the genes from the F1 parent including some that originated with a Barnevelder and others that originated with a Cochin. Depending on how many chicks you hatch, you may find a few with exactly the coloring you want, or you may have to compromise somewhere.
Feathered feet: you could get some feet just as feathery as the F1 chicks, other feet as clean as the Barneveleder feet, and some in between. If you want feathered feet in the final bird, you may want to choose some of the ones with the most feathering on their feet. Then again, they may not have the best other traits. so you have to either hatch more chicks trying to find a better one, or make choices about what traits are more important.
Body shape and size: again, they will probably vary between pure Barnevelder type, and the type you see in the F1 chicks.
The ideal chicks to choose for breeding would be healthy, and have as much as possible the traits you want in your final breed.
Depending on what you get, you might want to make another backcross to Barnevelder. For example, if the chick with the most foot feathers has a medium-good color pattern, you might be able to cross to Barnevelder again and find a few with a better color pattern and equally good foot feathers. (Similar thought process for each other trait involved.)
You were planning to cross Brahma x Jersey Giant. This is another F1 cross, so the chicks should be fairly similar to each other, with each chick having one gene from the Brahma and one from the Jersey Giant for each trait.
When you cross them to the other mixed chicks, you can get any possible combination of the genes involved. This can include color & pattern genes that originated in 4 different breeds, which can make for a wide variety of chick appearances. That can be fun to look at, but frustrating to sort out what you actually want to breed. If you got the previous mix stable with the Barnevelder coloring, that reduces the options, and makes the next step more simple.
I would figure out what traits you are specifically trying to bring in from each of these breeds, and at each stage make sure you get all of those traits in the chicks you are keeping to breed the next generation. Consider doing a backcross to one breed or another, or breeding same-generation chicks to each other, if you need to stabilize some traits or combine traits from two different birds into one, before you progress further.
As a mental exercise, I would suggest thinking of exactly which traits you are trying to add from which breed. If you can get all those traits from fewer breeds, you will have fewer other traits to breed out. For example, if you breed in Black Jersey Giants and French Black Marans and Black Langshans, you will be producing a lot of black chicks. It would probably be easier to get the Barnevelder coloring if you do not use so many black chickens. Or else, every time you cross in another black breed, make the next generation a cross back to a Barnevelder-colored chicken so you can get some chicks with the right color & pattern, and select away from the black.
I keep using color as an example because it is very visible and some of the genes are fairly well studied, but body shape and details of the feathering are very important for any chicken breed. If anything, they are more important than the color. If you are happy to have the Barnevelder color on a chicken with the wrong body type, you can make your life easy by just buying Barnevelders and skip all the crossing. Since you don't want that, you obviously need to pay plenty of attention to getting the type right, even if you have to let the color wait a bit, or hatch more chicks in hopes of getting the right color and the right type combined in some of them.
