I've been reading this forum like mad and have found lots of info about putting the heat lamp on the new chicks and reducing the temperature by 5 degrees each week. But what is the minimum temperature that 4-week to 5-week old chicks can tolerate?? I will probably be leaving my chicks to go on vacation when they are 4 weeks old and returning when they're 5 weeks old.... So I want to know if I can leave them in the coop outside without a heat lamp at this age.... but of course, this would depend on what the minimum temperature they can tolerate is. We'll have pet sitters feeding and watering them... Thanks!!!! Edited to say - I've found a few posts that say that 8-weeks old is the rule of thumb for moving chicks outside, but wouldn't this depend on the area of the country you live? There's a big temperature difference between Oregon and Florida, for example... Is there some sort of chart showing chick-age and necessary temperatures??