He may well carry the modifier gene (which uncurls the feathers). If so, he will pass that on to his offspring, and if they inherit it from the other parent, they will also display its results.Painted feathers thanks for comments...do you see what I mean about the roo not being very curly...does it matter genetically how curly the feathers are? Like did this roo not get full on Frizzle genes? Most of the frizzle I saw prior to ordering mine were much more curly. The black hen I kept has a lot better curl but she is tiny and I don't believe she has ever laid an egg.. I was dissapointed in the frizzles which is why I love my sizzle so much and want more of those...