So one of my chickens died last April. I want to get a new one but I keep on thinking, I have to quarantine it, make sure it doesn't have diseases, let the chickens get used to the other chicken, and they have to resolve the pecking order. It really sounds like a lot of work, and I have to go to school which is in September. What should I do? I have 1 aggressive bird, (Brownie) and a very docile bird, (Aurora).