Originally Posted By: Wieslaw
If you mean red mottled like speckled Sussex, then you just cross your Houdans to them and work from there. If you don't have speckled Sussex, you can use RIRs. You just hatch many eggs from F1 crosses, selecting those which show propper color, leg colour, crest, and number of toes. It can take some generations to regain proper comb.

I used RIR with Ancon wich is mo like the Houdan. F1 were all dark with some red on head.