Information from the Official Site
Bruno is one of the many leashed dogs to be introduced in to the book. He is a German Shepherd and Chow Chow cross with dark chocolatey brown eyes and a large mane around his neck. He, and the rest of the leashed dogs, soon find Lucky and allow him to tag along on their adventure. They quickly Brandish their new companion as the leader of their makeshift pack and set out into the wild to find a new home.
Protective and eager. He's strong and friendly and would help out his fellow survivors anytime.