They are descended from the Mastiff, and are the only toy breed that did so.
Most People who decide to breed Pugs do it simply because they love Pugs. A different more goal-orientated perspective of a pug breeder might be to breed their show quality pug dogs in the hopes of...
Pugs were originally breed to be companions.
No, the Pug is a purebred breed, first recognized by The American Kennel Club in 1885.
It is quite complicated but the pug comes from the mastiff.