Hi..I am new at this and am just have my serama chicks starting to hatch. I have week old chicks in with chicks that hatched yesterday....is that ok, They seem to all be doing well and cuddle together to sleep. SHould I put a their mom in with them? They are eating and drinking just fine. There are about 8 more eggs to hatch...can they all just be together? Also...how can i tell what sex they are??? I want to start selling them but have no idea what is what. Thanks!!