I have 3 BBS Orps in the bator that are 3 and 1/2 weeks old. They are all fuzzy with just wing feathers and a few tail feathers. I do realize they are a slow developing breed, but how slow are we talking? All the other chicks I have raised to date have gone outside around 3 weeks of age when they were mostly feathered. These Orps are definately slow going and I don't want to put them outside until they are fully feathered. It is snowing here today and the temps are only going to get colder. How old will they be before they have all of their juvinile feathers, and can maintain their own body temp?