On the 27th, I will received 5 chicks (2 days old) that I am planning in adding to my current chicks (they will be 2 weeks old, and one 3 weeks old). Should I leave 95F temperature for everybody? (My brooder is big enough for the older ones to be in a cooler place) or should I separate them (I really would like to avoid that unless the little ones get bullied.) Thank you