Well in England where Smallholding is prevelant, many many people keep Indian Game cockrels (aka Dark Cornish in the US). They are the perfect terminal sire. So, if they ever needed some meat chickens in a pinch, all they would have to do is incbuate any egg from any hen and you have your backyard 'Cornish Cross'. It gets murky if you have multiple roosters (like I have 12 or 15, who knows, I don't count) then you have to carefully separate into breeding pens.
I went with the golden rangers, too, for the first week in April. I grew Grey Rangers last year with great success. They won't be offered again, though, until June.