Though friendly and tolerant towards other animals and family children when socialized, certain pug-like qualities endowed in them make them sensitive and jealous of the other pets and kids present in the household.Ĭertain congenital diseases inherited from both their parents are observed in them. When left alone for long, these apartment dogs get destructive. They are loyal to their owner but may become stubborn at times. Some of them have inherited an obsession for digging and hunting instinct from the Jack Russell Terrier, making them bark aggressively at chipmunks or squirrels. The fearless, energetic and intelligent nature of the Jack Russell Terrier combined with the loving, sociable nature of the pug has made the jug dog a gentle, adorable and active breed. Being very alert, they are keen to know and be involved in all that is going around them. Since then, its popularity as a designer dog has widely increased in USA, UK, as well as Australia.
Although proper historical details regarding the origination of this breed is not available, the first crossing of its parents is said to take place in the 1960s in the United States of America.