Today I just got a new Buff Orpington(or Buff something), and 2 White Leghorns(we think, waiting to hear back from the lady... didn't think to ask while we were at her house). She said they were 8 weeks when she got them 3 weeks ago, but I have a feeling that the smallest one(who we've already named chicken little) is probably at most 8 weeks old now. The other two are quite likely to be about 11 weeks. Mostly I'm wondering how long, if at all, I should worry about quarantine?