My new little baby, 7 wks old, 2.5 lbs, has been doing fine....eating, running, playing, etc....and now all of a sudden, every once and a while she runs wildly, then stops and tries to get at her butt, bites her back leg, and cries. She has been pooping regularly, and urinating fine. She drinks and eats fine. But what is happening to her? I was at work tonite and my husband called me franticly worried about her. I will call the vet tomorrow and see what he says, but does anyone have any clue to what's happening? I will be up for another hour or so if someone can help me. Thanks..