The main types of pet dogs can be divided by the following aspects: firstly, in terms of size. Small pet dogs include the Poodle, Bichon Frise and Schnauzer. Medium-sized pet dogs include the Poodle, Shiba Inu, Border Collie, etc. Large pet dogs include Alaskan, Giant Poodle, Doberman, etc. Secondly, classification in terms of function. Companion pet dogs include the Poodle, the Pekingese and the Yorkshire Terrier. Pet dogs with the ability to work include Golden Retrievers, Equine Retrievers, Labradors, etc.
