These hatching eggs are special because you will know the day they hatch which chicks are male and female. Females hatch out Egyptian, and males hatch pharaoh. Females are a beautiful red coloration and males have brown standard coloration. These are great if you want to plan specific egg or meat pens, so you can separate out chicks or juveniles before feathers come in. This sex link egg will only hatch male-female color difference for this generation only.