For this tutorials I am going to show you how to make your petz look 3D using this picture of my siamese Ash.

First off select the Magic Wand and click in the white area in the photo. The Magic Wand button looks like this:
Then go to Selctions (located on the top toolbar), Invert.
Now go to Effects(located on the top toolbar), 3D Effects, Inner Bevel. Then adjust to the following settings:

Next go to Effects, 3D Effects, Drop Shadow. Then adjust to the following settings.

Then go to Selections, Select None, and... ta da! your pet is 3d!!