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В When a dog training school opens in Greenfield, the Boxcar Children bring Watch in to learn some new tricks! But at the very first class, a Dalmatian goes missing—did the dog run away, or was he stolen? And when a second dog vanishes at the next class, it's clear that the Aldens have a dog-gone mystery to solve! When a new dog obedience business opens in Greenfield, the Aldens decide to enroll Watch for a refresher course. At the first class a Dalmatian goes missing, and everyone wonders if the dog ran away or was stolen. But when a malamute disappears at the second class, Henry, Jessie, Violet, and Benny know they have a mystery on their hands. Could the thief be the class's instructor, the Dalmatian's owner, the dog groomer, or the owner with the very obedient dog? When a dog training school opens in Greenfield, the Boxcar Children bring Watch in to learn some new tricks! But at the very first class, a Dalmatian goes missing{u2014}did the dog run away, or was he stolen? And when a second dog vanishes at the next class, it{u2019}s clear that the Aldens have a dog-gone mystery to solve! When they take their dog, Watch, for obedience training, the Alden children discover that some of the dogs in the class have vanished and decide to try to solve the mystery of their disappearance.