Rajah my chick sultan has pasty butt or something. Is this dangerous? Its not a lot of poo but it wont come off so I left it alone. All the other chicks are clean. What should I do? At what age can you tell what gender they are? I already have my guess that one is a rooster and 3 are hens because the "roo" struts, is bigger, Its beak already has a large bump on it much bigger than the others and on the top of its head is larger and fluffier giving him the entire rooster look. Or cockerel if you prefer for now. They are all about a week old now. 2 Silkies and 2 Sultans (Bantys) and they couldnt be bought sexed because they are too small but I was wondering when and how anyways.