So I am thinking about getting a couple 9 week old Leghorns off craigslist. I already have 6 other chickens that are 22 weeks old (2 Dark Brahmas, 2 Production Reds, 2 Black Australorps). Most of my flock is laying except for the 2 Dark Brahmas. I have a few questions about adding these 9 week olds to the flock: Will I have to quarentine them? How do I go about adding them to the flock? That's all the questions I have for now, but I'm sure I will come up with more later Thanks in advance.