Should be fine, though I'd either crack the window or put them out for progressively longer periods outside so they're exposed to a wider temperature range than your consistent 60.We have 6, 5 week old RIR's. They have been in a spare room in a tent. Michigan has the weirdest weather ... it goes from 70 to 30 inside just a couple of hours. I was thinking to leave a window cracked at night. I've not turned the heater on in about a week, the temp holding around 60 in that room.
It's hard to tell temp in my state. Is it okay to maybe put them in their new home outside in a week or so?