Guest Stars Joseph May voices Additional Voices Matt Hill voices Thundermutt Credit Only Kelly Sheridan voices Mammoth Mutt Tabitha St. Germain voices Melanie Tabitha St. Germain voices Andrea Scott McNeil voices Ignatius Peter Kelamis voices Tail Terrier Nicole Oliver voices Kevin's Mom Alberto Ghisi voices Kevin Trevor Devall voices Hot Dog Ellen Kennedy voices Brainy Barker Michael Dobson voices Bulldog Brian Drummond voices Kevin's Dad Brian Drummond voices Streaky Phil Hayes voices Additional Voices Nicole Bouma voices Snooky Wookums Dale Wilson voices Paw Pooch Terry Klassen voices Tusky Husky Mark Oliver voices Mechanikat Russell Roberts voices Additional Voices Kathleen Barr voices Additional Voices Shannon Chan-Kent voices Additional Voices Gabe Khouth voices Additional Voices Kirby Morrow voices Additional Voices Jay Brazeau voices Additional Voices Paul Dobson voices Additional Voices Lee Tockar voices Stretch-O-Mutt Aidan Drummond voices Additional Voices Michael Donovan voices Additional Voices Don Brown voices Additional Voices Christopher Gaze voices Additional Voices Bill Mondy voices Additional Voices Mark Acheson voices Additional Voices Uncredited Peter Kelamis voices Bud Peter Kelamis voices Lou