Ok, my 5 girls are now 9 weeks old. They are in a coop and at night, in a dog crate. I no longer use the heat lamp (I'm in Souther California). We put some roosts (?) poles in. I'm not sure about nesting boxes becuase I read here they start to sleep and poop in them? Should I just keep the dog crate (w/shavings) in there for them at night? Till how long/age? TIA for any advice. They are doing great otherwise and getting free range time in the garden (WHICH THEY LOVE!!) when we're home.