Well, I’m not positive, but, if she’s not having any other adverse effects, I would say that it’s more of a psychological thing that a physical probelm. Try moving her bowls to a different location in the house and see if that changes anything. Do you leave food for her all day, or feed her at specific times of day? If she normally browses all day, try picking up her food and feeding her only at certain times. If the problem persists after you change physical setting and routine, or if she begins not eating/drinking or having diarrhea, then I would deffinately call your vet as there could be something really wrong.