So I adopted Tove a little over a week ago, and today I found a little patch of missing fur on her face, right beside her eye. Needless to say I'm pretty concerned. I've never seen this before in Tuulikki, my other pig. I'm also kind of a newbie at owning guinea pigs so I don't really know what it could be. Here are some other facts: She is 3-4 months old, she has a normal appetite, and is drinking just fine. Nothing about her behavior has changed. She is naturally nervous since I haven't had her that long, and she's kept by herself because I wanted to wait the suggested two weeks before introducing her to my other sow. Is this concerning enough to see a vet? What could this hair loss be caused by?