Yes, they are all chickens, but . . . . I am hatching out some seramas, some La Fleche, some of my own muttmix, and throwing some silkies in the bator for a friend ( hey, why not use the extra room?). I have heard serama only take 19 days, is it okay if I just put them in a day or two late? Also, when they hatch, do I have to be there (I work 9-5)? I am a little worried about them being such different sizes when they hatch and whether they will pick on each other that young. I also don't want to open the bator and shrinkwrap anyone to their shell.