In breeding anything looking at a long line of parents is important. IT tells about where the animal is genetically and where it is going and how we want to get there.
I think I can safely say that all domestic chickens and turkeys were developed by people breeding them purposely. Many of the breeds recognized today came from a mix of birds: RIR, and all the AMerican SOP chickens. They are no longer concidered a mutt. WHY?
WHen the Sussex became an organized group with a written SOP, they were lightyears behind other previously orgainized breeds and called mutts. Over the next 15 years, the breeders worked to improve the sussex and set the genes. TOday we do not call them mutts but are a recognized SOP breed.
Delawares-- Kathy IMO has built a new line and is only a few generations itno this project.She put together two breeds and get kudos from the likes of Robert BLosl and Walt Leonard. Are these mutts? OR purposely bred birds? Early on the term seems to be "project" birds but in howmany generations do they become a breed.
Cross breeding is a valid an duseful tool. Faster growth and increase healthy and a host of other positives.
THis method can also be used to re-invigorate a line. Either finding a related line many generations isolated, or adding in a parent breed from the beginning of the breed development; or adding an unrelated breed that has the gene characteristics tha could benefit a line and then select heavily for many generations.
POrters has a huge variety of birds that breed true. IMO most are a color that breeds true. THe SOP birds IMO must be from old stock. But given the propensity to develop all these gorgeous true breeding colors, without asking there is no way to know what breeds were used to make them-- probably a combination given the change in coloring. I'm not dissing Porters. He provides a great resource. I"m mearlu pointing out that I am no longer sure that the AUburns are pure given the situtaion.
Buff--- carefully read this. I read that this bird died out and was re-created. IT may be buff by color but it cannot be the original bird withit's own unique genetics and history of selection and exposure to climate and disease and selection by humans that made it unique from the others.
WHen is a bird just his colors? IMO a bird is how well it grows, what climate it is adapted to, the hardiness to with stand disease . . . . no one talkes about this.
As for selling /buying birds-- stick to your ethics of a moral seller , it will pay off. . If you treat a customer well, they will return. THose that feel dupped or cheated will not return. Buyers beware, get educated. ANd getting educated is a painful experience. Make use of what you learn. THis is part of life.
I hve lost sales in birds and horses because I was honest and up front. When I met a woman who told me not to do that, just tell enough to tease the buyier into wanting the animal-- she was in house sales. That explained everything-- they are like car salesmen. NOT my cup of tea.