Hello all. I have 2 chicks, and they are just 4 weeks old, but I am seeing differences in them that makes me think one of them may be a roo. I am posting pics, and if anyone can help me determine the sex, I would greatly appreciate it. They are both Buff Orpingtons and the same age, if that helps. This is Esmarelda, the chick I am sure is a female. She has the bustle. This is Henrietta, the one I am starting to think is a roo. She doesn't have a bustle like Esmarelda does, and seems to have a different looking tail. Here they are together. Henrietta on the left, Esmarelda on the right. You can really see the difference here. Henrietta is the one closer in this picture. When the chicks are more alert, Henrietta's tail goes up. To take this picture, I was making a blowing noise. Here's another pic of Henrietta's tail. This is a good side shot when Henrietta's tail went up. Any and all comments would be appreciated. Thanks.