I don't have electricity outside of my house so if we put a warming light outside, my door will have to be ajar all night. I'd rather just wait until they're big enough to sleep outdoors. How will I know when they're ready? They have a lot of adult feathers already. How will I be able to tell if they're done getting their feathers? I'm not sure how old they are exactly as my friend raised them for me until a few days ago. For now they're indoors in a cage.