Kvack

Kvack is a character in the comic strip Hagar the Horrible by Dik Browne.

She was voiced by Frank Welker in the 1989 animated television special, Hagar the Horrible: Hagar Knows Best.

About Kvack
Kvack is the family's pet duck. She is German and quacks with an accent. She wears a stereotypical horned helmet like the rest of the family.