Hey guys! So it's finally becoming winter time in California and my room is getting pretty cold. I don't think my apartment is instilladed because it's very cold without the window being opened. This being said, I'm worried for my girls. They have a hammock which they always sleep in together and another bird bed? I guess you'd call it which is a triangle looking hanging bed which they don't go in as much (has nice fluffy bedding on bottom). I've tried putting a cheap hide box (aka tissue box) and they never used it, just ate it. But I'm afraid because it's pretty chilling I'm the morning and at night. Any suggestions what i should do so it's not as cold for them? Only thing I can think of is a small portable heater type of thing. Thanks!