A lot of the color variation in chickens was probably first developed in games as mutations that where then incorporated into the production and ornamental breeds.He is a barnyard chicken and wont be near any real gamecocks. He is not mine, so I cant dub him, but he would look cool .
I have never bred non-game blood to my games, but I imagine it has been done in the past many times. I assume this is where we get the color varieties of games we see today.
Hypothetically, if I could breed a family of Leghorns that can out perform any American Game, would you be interested in breeding that bloodline? Someone created gamefowl a long time ago, so it could be reproduced again today if we wanted to, but its a "cardinal sin" so we dont even bother to try.
You could create games from silkies but time required would be impractical when intermediates of selection process would be decidedly inferior to existing games for a very long time. During the early stages of creating gamefowl, everybody had about the same quality to work with so even though would not be competitive with present day games they would still be superior to wild birds.