Shelley, you'ere going to need to build some pens for this experiment and not allow free ranging to keep the lines pure and no inteference from other birds that you don't want in the mix.
Take a roo from color A bird and a hen from color B bird and mate them together. Also take a hen from color A and a roo from color B and mate them together. This will establish your initial two lines to work with.
Take a daughter from your first line and breed her back to the roo, take a son and breed it back to the mother, do this with both lines. Also take a brother and sister from each and mate them together.
This will give you 3 lines to work with, Paternal, Maternal, Sibling.
The Paternal line will establish what traits from the roo you want to keep, the maternal will establish what traits from the hen you want. The Sibling line will show what defects are hiding in the birds and allow you to breed them out.
Next you will want to breed granddaughter to grandfather, grandson to grandmother. This will help stabilize the genes and you can see what is working and what is not. Breed sibling to sibling again, you should get some birds that have everything you don't want and some that you do out of this pairing. Keep the ones you want, butcher the rest.
Now you want to take a Roo from line B and breed it to a hen from line A, take a Roo from line A and breed it to a Hen from Line B.
This will restore vigor to both lines and you should be almost to your goal.
Remember some charecteristics are sex-linked, usually to the opposite sex by the parents.
Take a roo from color A bird and a hen from color B bird and mate them together. Also take a hen from color A and a roo from color B and mate them together. This will establish your initial two lines to work with.
Take a daughter from your first line and breed her back to the roo, take a son and breed it back to the mother, do this with both lines. Also take a brother and sister from each and mate them together.
This will give you 3 lines to work with, Paternal, Maternal, Sibling.
The Paternal line will establish what traits from the roo you want to keep, the maternal will establish what traits from the hen you want. The Sibling line will show what defects are hiding in the birds and allow you to breed them out.
Next you will want to breed granddaughter to grandfather, grandson to grandmother. This will help stabilize the genes and you can see what is working and what is not. Breed sibling to sibling again, you should get some birds that have everything you don't want and some that you do out of this pairing. Keep the ones you want, butcher the rest.
Now you want to take a Roo from line B and breed it to a hen from line A, take a Roo from line A and breed it to a Hen from Line B.
This will restore vigor to both lines and you should be almost to your goal.
Remember some charecteristics are sex-linked, usually to the opposite sex by the parents.