We got day old Golden Comet chicks 1 month ago. They have been in a large cardboard box in the garage with a heat lamp. But the dust they are creating is awful ! and the house is starting to smell like a chicken coop. If it was July, I wouldn't be aftraid to put them outside in the coop, but our nights are getting down to 32 and our days are about 50. When are they old enough to take the colder temperatures in the coop ? Also, we have some mature Buckeye chickens that we hatched this last spring. Eventually we would like to mix these chicks with them. When is a good time to mix them ?