Maggie and Sam are Walter Lantz characters, who made their first appearance in the cartoon "Crazy Mixed Up Pup", in 1955. Their final appearance was in 1957, in "Fowled Up Party". They were created by Tex Avery. Maggie was voiced by Grace Stafford and Sam by Daws Butler.
Sam appeared alone in a handful of Woody Woodpecker cartoons during the 1960s.
List of appearances
Crazy Mixed Up Pup (02/14/1955) The Ostrich Egg And I (04/09/1956) The Talking Dog (09/24/1956) Fowled Up Party (02/11/1957) Crowin' Pains (Sam, alone, 10/01/1962) The Tenant's Racket (Sam, alone, 07/26/1963) Woody and the Beanstalk (Sam, alone, 03/26/1966)