My cat has recently started dragging her water dish across the kitchen tile, and will often try to drag it over the small ledge at the doorway to tip it over. She does this even when I have just washed and put fresh water in her dish. She also has recently taking a liking to me putting ice cubes in her water. That is fine but the dragging is driving me crazy as she does it all hours of the night & day. Why is she doing this?