Little bit of background. I just adopted a pair of 11-month old cats, brother and sister. Up until they moved in with me, they were living in a foster home along with their mother. Upon arriving at my house, the female cat darted under my bed as soon as I opened the carrier door, though the male hung back in the carrier for a little bit to figure out what was going on.
When I presented him with food, he sniffed the air for a bit and got curious enough to come out and nuzzle my hand before going under the bed to lay with his sister and comfort her, I presume.
Since then, he has been very sociable, coming out to hang out with me and give me affection almost instantly. The female, however, is another story. She stays under the bed all day and comes out at night to prowl around the room with her brother, but will not let me approach her without darting back under the bed. Last night she was squeaking and meowing quite frequently, first trying to get into my fireplace and then meowing at the door as if she wants to get out.
Is this behavior normal? I can't even really see if anything is wrong with her because I can't get close to her without her running away. Last night, for the first time, she came out into my room at night and looked at me, which is a breakthrough, but was still meowing as if in distress. Physically, she looks fine from a distance, but I'm not sure if I should be worried about her acclimating to me and the house, in general.
Thanks, in advance, for your responses!