I have a question about adding to an established flock. I have three girls currently who are 1.5 yrs old. And they are laying less than I would like (but are laying within a normal range, I just have a growing family that's eating more eggs now). I'd like to add a girl or two to the flock, but am really worried about making my girls sick. I kinda missed the "chick days" this last Spring because I hadn't decided to expand then. However, I just came across a person selling 11 wk old pullets. What vaccinations should I be concerned about them having and how long should I keep them separated from my girls to make sure they are safe to introduce? Also, I don't have the room or money to build tandem runs to "introduce" them for weeks on end. Any recommendations on how to integrate three month old (the age they would prob. be when I was ready to put them in with my girls) pullets into an already established flock? If it helps, I currently have two barred rocks and one Delaware. They Delaware is the pushy one, but one of my B.R.'s is a feather picker (mostly her own, the dork. She's purty, but not real bright. LOL!). I'd be looking to bring home two Australorps.