Dogs are tops--35 percent of Canadian households include at least one canine--and anyone who's been owned by one (yes, that's right) will tell you why: we share in each other's joy and pain; they cheer us up when we're blue; they strive to please us and are indispensable workers, serving us even at their peril; we pamper and play with them, train them and take them for walks (actually, they take us); they sleep in our beds; sit on our laps; and if...