Howliday Inn (Bunnicula and Friends) Library Binding edition

Harold and Chester could hardly believe it. The Monroe family was going on vacation without them. Bunnicula, the family rabbit, would be boarded with a neighbor. But they, the family's loyal dog and cat, were to be sent away with strangers; they were to spend a week at Chateau Bow-Wow.
Chateau Bow-Wow, observed Chester, soon after they arrived, could more properly be called Howliday Inn. Though what was howling, neither of them knew. Chester had his suspicions however; only a werewolf could make that chilling sound.