Heavy breed roosters, 13 LF roosters, and heavy breed hens 11 LF hens 9 Other then this above, I don't know. I use wire ties until I know they are staying. I have tons of colors. I get them from: http://www.9thtee.com/zipties.htm What I do is each hatch gets a color. Then if I see a particular bird I like when its young, I will put another color on it to "watch" its progress. You can also make the pullets the right leg, and cockerels the left leg, to see if your guesses are correct when they are older. It very helpful, you just got to remember to track your color system!!!