hey everyone. i have a question on outside temperature. how cold is too cold,i have 2-5 week old chicks and 2-3 week old chicks. from day 3 when i got them they were in a small coop in our garage with a radiator heater keeping the entire room nice an warm . i just moved them out to and old play house that i turned into a coop. they have been in the new coop all day and i put them back in the small coop at night. i have been doing that for the last 3 days/nights. today i brought the heat lamp out and placed it facing one of the nesting boxes and after about 10 minutes of really loud chirping they jumped into the box and stayed quite. what i want to know is,is it too cold for them still at night being outside but under the lamp? i listed the subject as southern california because thats where i live and cold for us is 45 degrees tonight.