I want a dog

"When cousins Dennis and Mellie decide to get a dog, they consider carefully what breed would be best for each family. For example, Dennis wants a big dog, but Mellie wants tiny. He has no other pets, but she has other pets that a dog must get along with. They consider different dog personalities, family situations, and personal preferences. Dennis writes an opinion essay for his teacher, Mrs. Shirky. But will his essay convince his parents to get the dog of his dreams?"--Provided by publisher.