So i just adopted two 4 week old female rats, they are sweet and seem to be adjusting. I just got them yesterday afternoon. I have a question though, they wont sleep in a wood house or a fleece hammock i got them. They instead sleep out in the open on a cloth. My room is in the basement and does get cold, but not too cold however i am still worried as to why they are acting like this. They also dont sleep with each other all the time. Im thinking they are still adjusting but then wouldnt you think they would want to hide?