From my limited knowledge of similar issues in chickens, I suggest having two breeding pairs of 1 solid and 1 broken each.I've been researching a lot today!! I just realized that a doe I had WAS a charlie. She had the nose/eye/ear markings so I assumed that that meant she was not a charlie. She had wool block quite often, her poops were all weird and big, and everything makes sense now!! She's the one in the picture. She did end up passing, and I didn't know why. So much to learn about this complex issue. She had a baby that had no nose markings, no ear markings, and only partial eye markings, and some markings on his back. Was he a charlie? what is the definition of a charlie? One person online said less than 50% color, another said less than 10% color. I am wondering if I should re-think this whole thing, and maybe either sell one of my broken mini rexs or have two breeding pairs, each consisting of a broken and a solid. Or just try a litter and see what happens. I want to start out right, so I don't have disaster in the end. What are your thoughts!?! So glad you brought this up.............