The Case of the Dinosaur Birds - John R. Erickson

nIt's scrap day on the ranch - a glorious day for Hank, his sidekick, Drover, and Pete the Barncat. But when two very unusual-looking creatures fly overhead, the glorious day takes a sudden turn for the worse. Suddenly the scraps have vanished and the Head of Ranch Security finds himself dealing with an invasion by a couple of ancient dinosaur birds There's never a dull moment when Hank the Cowdog is around....