Simon is a long-haired dachshund who loves to eat cheese and hates to exercise. Susie tries to feed him diet dog food, but Simon hates it When Susie goes to summer camp, Simon stays with Susie's friend, Annie. Simon fools Annie into feeding him lots of cheese and letting him take naps instead of walks. But one day, Simon wakes up and finds his tummy gone There is a furry beach ball where his tummy used to be. How will Simon find his tummy? In SIMON LOSES HIS TUMMY, the humorous and gentle message of the importance of eating healthy foods and exercise will appeal to young children as well as their parents.