Again, reviving an old thread.
To get Isabella coloring, without having it to start with...
1) Does it have to be the roo that is lavender? Or would it work as well with lavender hens under something like a brown-red Ameraucana roo if one were wanting to create Isabella coloring in Ameraucana?
2) Does this only work with certain breeds or are there people working on Isabella coloring in other breeds?