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