Create a Pet

Similar to Create-A-Sim, this is where pets are created.

Sims 2
Create-A-Pet is basically customizing it in to pretty much any shape and size that your pet can morph into.

In The Sims 2, the Create-A-Pet feature is part of the CAS. An adult or elder dog or cat can be added to the family. There are many options to customize the appearance of a pet as well as predefined breeds. A pets personality and names can then be chosen. You can also unlock many new coats and collars through in-game experiences.