Hey knew to this but it looks like you are trying to create Red Orpington chickens. I can tell you from somone who has already done this that crossing him to buff will only give you buff with orange cast. I have about 4 red hens left whith pink skin and white legs. All have a little black in tails only and one has a turkey neck. Gave away several roosters last year tht matched this description. All are large with puffy butts. If you need some help let me know. this took several generations.