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