I'm looking for a cross-breeding chart. Does such a thing exist? Specifically, what characteristics are passed on from each type? As an example, Crossing a Light Brahma Roo & Buff Orpington, versus crossing an Orpington Roo with a Brahma hen. What are the differences in offspring? OR if I cross a Cornish with an Australorp, can I get an excellent layer that gets heavy quickly? I think such a chart SHOULD exist, if it doesn't already.