I hatched some chicks last week and tonight while I was watching them, I noticed a couple of them are starting to develop a split-comb. I have always purchased pullets before this hatch, so I am unsure if this is normal or not......or maybe breed or sex sensitive? The roo is a Houdan X and the hens are RIR. Some chicks did get the 5-toes, but the split-comb so early??? Anyone have any comments on this?