My female, 5 years old, has started pooping out side of her box. Sometimes right in front of it. I thought maybe she was constipated so I changed cat food brands and give her hairball treats almost every night. She is still pooping out of the box 90% of the time. Fortunatly is on tile floors, but the Emmy is only 5, I don't want to clean up her poop for the next 15 years. Reggie, her brother will eat vasoline and has no problems. I have to fight Emmy to eat vasoline or the hairball stuff in a tube. They each have their own liter boxes which are cleaned every day. Advice??????