When you are creating a family, choose the cat. Use the fur color code to unlock the 'Deep Red' cat color. Choose 'Head' then go to where you can change the shape of the snout. Find the longest snout available. Its face will now resemble a fox somewhat. Make sure the ears are as large and as fox-like as you get them. Then, go back to the place where you can change its fur and colors. Change the 'Extra Fur' option to #2. Now, go to 'Fur Markings'. Choose the first one. Change that to the narrow strip on its chest. Make its color pure white. Go to the second choice of fur markings. Make its legs all black. Finally, choose the option that makes both of the ears covered in the back with the color black. Add your choice of neckwear if desired, and you will now have a pet fox.