Hello. At the moment I have two 4 week old chicks in a brooder in my garage (buff orpington and barred rock) and 5 chickens in an outdoor coop (two white rocks, two silkies, and a tiny white chicken which i am unsure about breed). I was wondering when the right age would be to add the two new chicks into the flock. I'm also worried that they will be picked on when I do put them together, so is there a way i can prevent this? Also my chicks are on a recommended diet until they reach 18 weeks of age....won't they need to be in the outside coop by then? And if they are in the outside coop they would be sharing food with the older chickens (they are eating laying mash). So what do I do???