Henry and Mudge by Cynthia Rylant
Henry is lonely. He has no brothers and sisters, no children live on his street, and he has no pets. Because Henry was so lonely, his parents let him get a pet dog to keep him company. Thus begins the friendship with Henry and Mudge, the 180 pound, 3 foot tall, drooling dog.
Henry and Mudge is a cute story about the love between a boy and his dog. They are best friends and constantly make each other happy. It is a great story for children who are just learning to read