The Sims 2: Pets Cheats

How to get A Snow Tiger at a pet
Chose a small cat if you want a cub or a big cat if you want an adult

First you change the colour of your chosen cat to pure white, then do fur markings:
1st: black stripes
2nd: black back ears
then go to morth face
nose: pushed in but not too far
eyes: round and small
ears: the spike ones but not the tall ears

then look at your cat and it should look a little like a snow tiger!