My group of 'girls' (for the exception of a definite BA boy) are now 5 weeks old and are looking & acting like little chickens...which is a good thing! I have been putting them out in the fenced garden area for the afternoon when it is warm enough; they have been fine down to 45 with sun and some shelter. At night they come back into the brooder until we get the coop finished. When that happens they will be good to go with a temp run until they are old enough to safely free range! Here they are...the chickens Except they still have little fuzzy butts!