Yea that's it, How can I package my pet? Thanks, in advance

If it's a pet born in-game, you can go to the phone and call the pet registry to register your pet as a new breed. Then go into Create a Family, and create a pet. You'll find it as a breed in there, and can package it in that screen. It'll save it to a sims2pack file that you can then share. Alternately, if you're creating a pet in Create a Family you can save it as a breed there and package it all at once.