I have 9 chicks that are 4 weeks old and are almost fully feathered except for on their heads, then I have 26 Cornish x that are almost 3 weeks old but they only have feathers on there wings and starting to get them on there chest. I am just wondering when I can move them outside? I live in East Tennessee. and well we are still having some cold nights low to mid 30s and the days are upper 50s to low 60s most days. But we do have a few days in the upper 40s low 50s.