Ok, so about 2 weeks ago I bought a pet store rat, and I heard some sneezes and took her to the vet and got her treated. I just got her back about 2 days ago, and she still has some sneezes which I think are normal when she is somewhere new, but she makes these noises at night and when I pick her up. One of the noises sounds like she is grinding her teeth, the other noise sounds like a whistle, and the other noise sounds like a bird chirping. Can anyone tell me what these noises mean, and if I should be concerned about any of these noises. Like at night when she makes the noises is she just making them because she is alone and wanting some company, or what?