Chugs were developed by crossing a Pug with a Chihuahua and they are not recognised as a breed by The Kennel Club and other international breed clubs (as of October 2017), but are classed as “designer or hybrid” dogs. With this said, the result of crossing two pure breeds has seen Chugs become an extremely popular little dog both here in the UK and elsewhere in the world and for good reason. Chugs are not only adorable looking having inherited many of the physical traits of their parent breeds, but they also boast very kind, affectionate and loyal natures.