Book excerpt: Gus herds his people like sheep. Abby loves borrowing slippers. And once, Mr. Beefy ate a pie. It's a dog's life. Filled with squeaky toys, mischief, and plenty of naps. Every dog has a tail to wag and a tale to tell. Patricia MacLachlan and Emily MacLachlan Charest asked this collection of canines to speak up with their own words, barks, and yips.