We feed Toby (my siamese) science diet, he seems to love it. he also has a nice litter box with a ramp up one side, i'm sure it wouldn't stop Pixie tho.. It keeps the smell in there and is pretty nice. A litter locker is nice to have too. You scoop the litter and put it in the top of the container and turn the handle and the bag locks the potties in there and keeps it smelling clean too. there are replaceable carterages.
Litter Locker: Petmate Litter Locker Plus at PETCO Booda Dome Clean Step Litter Box - CatsPlay.com - Fun furniture, condos and climbing gyms for cats and kittens.
good luck! looking forward to pictures!