http://www.inpactvirtuel.com/news/Sims-Animaux-Cie-11313.htm
French article.... but someone was kind enough to translate.
-30 types of dogs (races)
-15 types of cat (races)
-Guinea pigs, birds and most likely more
For the first time ever, players can create pets for their Sims to
love, train, play with and take to the park. Create-a-Pet allows
players to mix, match and create the perfect dog or cat for their Sim.
Labradoodle? Shnoodle? Puggle? Choose breeds and customize your pets.
Put your pets to work in a variety of different careers including Show
Business, Security and Service. Hang out in Central Park, the
community center where you can interact with other Sims while shopping
for various pets accessories. Play "doc" as your run the town Pet Care
Center! Gain status based on your Sims pet care skills, from
performing examinations to healing, playing and training.
Give your Sims a lovable pet friend. Create or adopt classic pets
including cats, dogs, birds or guinea pigs. Train them to do tricks,
help around the house, win prizes and gain social status in your
neighborhood.
Create the perfect pet for your Sims to train, play and love through
life's great moments. Create and breed unique dogs and cats and give
them personalities. Your Sims can also train their pets, teach them to
do tricks, or get them a career in show business or security.