I have one silkie and 3 bantam Cochin mixes that are about 5.5 weeks old. I'm really having a hard time deciding when to move them outside since it's so close to winter I'm thinking I should now or soon so it won't be such a climate change for them. This week the high is from 45-72 and low ranging from 27-50 I'm in southern Indiana. I was thinking maybe for the first week or so doing the coop during the day and brining them back into the garage at night?! Or when should I move them outside? I'm also really worried about using a heat lamp in coop since my coop is pretty tiny. It's this one from tractor supply http://www.tractorsupply.com/tsc/product/precision-pet-orb-country-classic-coop And we are building at 6'x3.5' run off of it (is that large enough for 4 small chickens?) The coop is small on the inside having a lamp in there worries me but I also know since my chicks are so small they probably can't handle the cold as well. Advice please!!!