I got my 6 new babies on the 3rd but I'm not sure how old they are and can't find anywhere that tells you about the age of when feathers on different spots come in. 4 of my chicks just have some wing feathers, 2 have the wing feathers but also have tail feathers coming in. I assume these two are a little older than the others but I don't know how to even "guesstimate" how old. Here you can see one has a fluffy butt and one has tail feathers, the other getting it's tail in is about the same length/amount and the others have the same fluff butts as this one. I suppose it really doesn't matter their age, it'd just be nice to have an idea.