How good is a Pug at guarding the home?

A Pug’s guarding ability is fairly strong; it is alert and brave, making a good guard dog. Pugs naturally protect their territory and family, and will bark at strangers approaching to warn them off. So if you want a guard dog, a Pug is a fine choice.

However, due to its nature it may show aggression toward strangers or other animals, so proper socialization training is needed to avoid unnecessary danger.