Dispose of the worst. You have now bred your birds and raised offspring from them. Looking forward to the next breeding season you will have to start planning your next mating's. Birds produced by out crossing generally are more robust. However they may also be very different as to colour and type from one another.
Out crossing adds genes.
Inbred birds tend to resemble each other more, for inbreeding tends to limit the genes. Most breeders tend to inbreed, only out crossing to improve their line, or when they are having a problem with fertility, and hatch ability.