I've had four cats for the past seven years, and trust me, nothing's wrong with her. I like to think of cats as moody teenagers; sometimes they want to be left alone, and other times they want to be loved. When a cat is comfortable and relaxed, she sometimes gets snippy when she wants to be left that way. I was worried when my cats did that too, but my vet told me it was completely normal. So no worries. ^_^