My piggy's fur has never been puffed up and i just saw today that from her front paws up to her head her fur looks a little puffy. She's also been making this weird scratchy squeak noise which i'm not sure is normal but she can stop it when she wants so I don't know but her fur is worrying me. I lost three guinea pigs a little while back and all three of them had puffed up fur. Is this normal for a piggy to have their head fur puffy?