Rose Byrne - Wendy The Dog (Voice)
Parker Posey - Amy The Dog (Voice)
Kristen Wiig - Pookie The Dog (Voice)
Amy Adams - Sunshine The Dog (Voice)
Elle Fanning - Little One The Dog (Voice)
Sarah Silverman - Candy The Dog (Voice)
Laura Silverman - Mandy The Dog (Voice)
Judy Greer - Susan The Dog (Voice)
Kristen Connolly - Paula The Dog (Voice)
Jon Hamm - Timmy The Dog (Voice)
Kristen Bell - DeeDee The Dog (Voice)
T.J. Miller - Ricky The Dog (Voice)
Aaron Staton - Ryan The Dog (Voice)
Sam Rockwell - Fritz The Cat (Voice)
Charlie Day - Hercules The Dog (Voice)
Luke Perry - Ring Announcer Dog (Voice)
Michael Park - John The Cop
Ralph Macchio - Himself
Pedro - Max, Sean, Brian The Dog (Voice)