I think it's normal. It probably depends on her activity level, your schedule, the weather, and what you're feeding
Try feeding her on a schedule, and also pay attention to what foods are in the mixture you're feeding each time. Also, make sure to measure the food with standard measuring cup. Write down when she eats, how much she eats, and what it is. You might be able to find a pattern if it's certain foods she doesn't like, if she eats more at certain times, etc.