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