I kind of forget sometimes there are cats and dogs because strays don't show up in most neighborhoods (which isn't necessarily a bad thing) and in past games that was how my sims obtained most of their pets. I did give the Goths a black cat though. I don't mind not being able to control them and I love the level of customization, I just honestly never remember to play with pets.
I do however, love the rodents from My First Pet Stuff those are great.