Hi all - hope someone more knowledgeable than me can offer some advice... I have one chicken left of my original flock of three (she's about 4 years old) & I've read on here that single chickens aren't happy. I'm building a larger coop and would eventually like to introduce 4 new pullets. What's the best way to do this? Quarantine? See but don't touch? Do I need a separate coop too? And what about roosting at night? Help!