The title of this book says it all.  Everyone who has owned a pet has noticed some rather gross behaviors at one time of another.  This book explains the reasons behind the sometimes disgusting actions.  With each turn of the page, one reads about an odd fact of another pet.  Beginning with rabbits, often gross facts about cats, ferrets, dogs, lizards, rats, and hermit crabs are explained.  The pages are colorful, the photographs are large, and the text is easy to read.  Definitions of highlighted words appear at the bottom of the page as well as in the glossary.  Additional “gross fact” boxes include other related material.  Titles of other books to read are in the back with a facthound internet site and index.  An additional site from the publisher provides projects, games, contests, and quizzes just for kids.