"Hank the Cowdog: The Case of the Saddle House Robbery" by John Erickson (Book 35)

There's a new dog on the ranch, and Hank is none too thrilled about it. Hank's supposed to keep an eye on Jake the Birddog 'til his owner shows up. Jake has other plans. Jake needs to get to Madagascar before someone makes off with his treasure! As if Hank doesn't have enough worries, there's also a saddle thief on the loose. Is Jake in cahoots with the robber? Are there monkeys under the toolshed?