Okay I know that there are Buff Plymouth Rocks, but I would like to know how I could create a Buff Columbian Color in Plymouth Rocks. I like the Buff Columbian color better than just buff. I realize that it would be years to get them up to perfection. I would be dedicated to the project if I decided that I would like to take it on. I would like to be able to start with an actual Plymouth Rock ( what ever color would work best) if the experts think that would be workable. Okay so what other breeds would be good to include to be able to come up with this color variety? Ready and go!