My friend's cat is tracking poo through her house! The little kitty (a female, about 5 - 6 months old, saved from being a stray) likes to play in its litter box. However, it often gets poo on its feet and doesn't clean them off, tracking poo through the house. She is eating Purina Kitten Chow. She doesn't poo anywhere *but* the box but she tracks the poo with her as she leaves. Any ideas on how to make her stop?