Unleashed

About.com : The Sims Unleashed Review
Brief review explains the key aspects of this add-on pack.
http://compsimgames.about.com/library/products/aafpr_simsunleashed.htm

GameSpot
Previewed by Trey Walker, "The Sims: Unleashed will include an expanded neighborhood with several new environments such as parks, pet stores, cafes, and markets. Players will be able to visit a pet store and purchase a variety of creatures to add to their sim family." <small>(October 7, 2002)</small>
http://www.gamespot.com/pc/strategy/simsunleashed/news_2873903.html