The Case of the Buried Deer (Hank the Cowdog #73) by John R. Erickson

Happy Lab is back in town, and it looks like he's up to his old good-natured, bumbling ways... But, while Hank and Drover might find him a little exasperating at times, this latest adventure proves that a loyal lab is a great friend to have at your side when the going gets tough.