Comparison between pets themed games

The Sims: Unleashed, The Sims 2: Pets, The Sims 3: Pets and The Sims 4: Cats & Dogs share the same concepts, though there are significant differences.

Features in both

 * Cats
 * Dogs
 * Small pet

Features in The Sims 2: Pets not in The Sims 3: Pets

 * The ability to buy custom-made pets from pet stores. There are no pet stores in The Sims 3. EA has released a pet store that is downloadable for free in the official store, but it still does not sell pets. Cats and dogs can only be gained through adoption of computer-made ones, except for horses which can be both adopted or bought at the stable.
 * Werewolf (Creature) (added in The Sims 3: Supernatural)
 * Wolves and Pack Leader
 * Pets can have a job in three different careers
 * Skunks

Features in The Sims 3: Pets not in The Sims 2: Pets

 * Horses
 * Unicorn (new creature)
 * Small pets
 * Turtles
 * Lizards
 * Snakes
 * Pets have traits
 * Wild animals
 * Shrews
 * Hedgehogs
 * Squirrels
 * Deer
 * Raccoons
 * Chinchillas
 * Chipmunks
 * Pets have wishes
 * Racing (for Horses)
 * Pets have lifetime rewards
 * Sims can see and interact with ghost pets
 * New town to explore
 * Ability to control pets and cancel their actions without using cheats.
 * Plastic Surgery
 * Ice Cream Truck
 * Equestrian Center
 * Ranches
 * Hug Pet Interaction
 * In The Sims 2: Pets, this interaction is only available with cats.