First of all, the cat should be confined to your dd's room. It isn't fair to your older cats to have to put up with the brat! The cat needs to be checked for a uti or diabetes. My grandmother's cat came to live with us after she died (my Mema, not the cat!) and he was peeing just outside the box. Luckily the box was in a special room with just linoleum on the floor. I thought it was an uti, but his sugar #s were off the chart.