Took mine about 3 weeks to get on the roosts they wanted to huddle all bunched up in a corner. So i'd go out every night and put them on the roost. It just takes time. Some more than others. I just try things and if it dont work i try something else. Its a learning game. Not all chickens or...
If theyre feathered out good, they should be fine snuggled up with each other. But if it would make you feel easier about it just stick a light out there. It wont hurt anything. Here in Ky we are having a heat wave so ive got a fan on mine. Was really stressed today at work worrying about mine...