cat or dog
There are many in this world, I guess.
Thee DOG is the most popular pet in the world.
The most common family pet in america is Dogs.
A Labrador Retriever is the most common dog to have as a pet. ^-^
The most common species of dog as a pet is a labrador retreiver.
an ant
Max is the most common pet name in the US. Other common names are Tigger, Tiger, Jake, and Buddy.
i guess the most common pets are dogs since these are good companions and are faithful animals.....................!!!!!!!!
dogs
a dog
Dogs
Dogs, but cats are also very common