I have recently purchased 2 breeding pairs. 1 pair is a RH LB YB male paired with a RH WB YB female. The other is a Salmon Head WB Silver male paired with a SH WB Blue Back Female. Since I just purchased them a couple of days ago I want to make sure these are good pairings before I allow them to breed. I have other gouldians I can pair them with as well (I have 2 male n 2 female unpaired normals) The breeder advised me that both these are good pairings.
I needed some extra time to think over your second pairing. Sorry for the delay. Your first pairing sounds good to me. I am partial to pairing like head colors with like head colors. The variety of the breast colors you will get should be quite interesting I imagine.
The second pairing, I have some reservations about. Silvers are silver because they do not have the ability to produce the true colors red and green in their feathers. I think. So, they have all the mutations of a blue back and then some more. White breasts are also caused by mutations. You are pairing a lot of recessive traits to a lot of other recessive traits. This was always something that I was warned against doing because I was told that as recessive genes increase so would this lead
to other non visual mutated genes and then to weaker constitutions or specimens in the birds. It was common knowledge that white breasts, being recessive should not be paired to other white breasts. The pairing should be wb to a split-to-white breast. A split-to-white breast has one parent that is visually a wb, who donates one recessive gene for a white breast, because that is all it can donate because it has to have two recessive genes for wb or it won't be a wb, from one parent and one gene for a purple breast, (the dominant gene), from the other parent. A split-to-white breast is a Gouldian that is a Pb visually, but also carries a recessive gene for a wb. The whole thing becomes more clear if you think about the situation compared to the colors of human eyes, the brown color being dominant to the recessive gene for blue. The sensible and short answer is do what you think you want to do, but consider that increasing numbers of recessive genes may, and has in the past, frequently lead to more fragile Gouldians over all. This is not always the end result, but if there is trouble with the viability from the pairing of your silvers, you might want to change partners. Very sorry if this is confusing. Let me know if I am not clear things up for you. Best Wishes, Jeanie