You know what I'm going to write; let the chickens decide who breeds with who.I think there might be some hope in people giving up on breeds altogether and just breeding backyard mix-up chickens. But I see very little evidence of that happening. Some do, like @janiedoe and I'm sure there are others too. But the majority remain fixed on breeds.
In many cases breeds are all that's available. I got lucky with Ivy and Peggy.
