Sammy the Runaway Mastiff by Vince Stead
Approx. 25,490 words.
Published on November 4, 2010.
Sammy is a Mastiff dog that breaks out of his kennel to explore his neighborhood and the world. He meets other animals in his neighborhood and then he gets lost while discovering his own town. He is lost and meets new friends along the way who help him and feed him. Meanwhile, back at home, Jazmyn is worried sick she might never see Sammy again, since he broke out of his kennel.