The Jug is not a purebred dog. It is a cross between the Jack Russell Terrier and the Pug. The best way to determine the temperament of a mixed breed is to look up all breeds in the cross and know you can get any combination of any of the characteristics found in either breed. Not all of these designer hybrid dogs being bred are 50% purebred to 50% purebred. It is very common for breeders to breed multi-generation crosses.
American Canine Hybrid Club = Jug
Designer Dogs Kennel Club = Jug
International Designer Canine Registry® = Jug
Chloe, the Jug at 2 years old. "She is very loving and great with children, cats and other dogs. She takes after the JRT and is very high energy and very intelligent. Jugs should have access to a fenced yard as they love to run and dig. They will chase squirrels, rabbits, etc so the yard should definitely be fenced."
ACHC, DDKC, DRA, IDCR