Our 3-week old ducklings needed a bigger cage and our 6-week old girls just love being outside sooooo much so we decided this weekend to let them sleep outside. They've been going outside for the day for over a week and are very used to their routine. When it starts to get dark they come to the back door and sit on the step. Saturday I got a dog "pool" for them to wash and float in; it's not deep enough to "swim" but they seem to love it now that they've figured out how to get in and out of it. It was about 45 degrees here last night. We have one of the medium-sized igloo style dog houses, with some old t-shirts and pine shavings in it, just like their cage was in the house. At first they weren't thrilled with being in the dark (in the house the cage is in the living room so they are really used to us being around and there being a lot of noise and light). We blocked the doorway so they couldn't get out and most importantly nothing could get in! After about 2 hours we went out to check on them and they were contentedly chirping away. This morning hubby went out to let them out and they didn't seem to want to be bothered. They were slow to come out but did after about 15 minutes. I didn't realize that he didn't put any water or food in with them last night though I was so worried they would be mad at me but they were very attentive this morning and haven't "asked" to come in at all today, which is a first.