How to adopt:
Stop your sim from doing whatever she/he's doing.
Go to your cell phone and click "Call for Services."
There you will click the "Adopt a Pet" or whatever it says. Something to do with adopting pets.
The game will send you a message: "You'd like to adopt? Wonderful." or whatever.
Wait patiently for a car to stop at your front door.
When it arrives, the game will automatically stop whatever your doing, and you chose between cat, small dog, or large dog. Then you pick baby or an adult. THEN you pick if its a boy or girl. And THEN you name it.
Have fun with your new pet!
(hint: you do NOT get to customize your newly adopted pet)
(hint: you CANNOT call when adoption in progress! It will cancel your adoption)
(hint: you CANNOT give your pets traits)