Whats the best thing to put on chickens to identify them from each other? Im looking for something permanent. I have always been able to tell my chickens apart, but now that they are maturing, Mrs.Nezbit and Emerald, the Australorps, are becoming indistinguishable. The only way for me to tell them apart now is by the discoloring on Emeralds beak that was caused by a slight injury. They used to have very different combs and wattle and Emerald was smaller, but that has changed. The tan-ish color on Emeralds beak is disappearing and very soon they will look identical.