She has worked on four television series by Seth MacFarlane's Fuzzy Door Productions: Family Guy, American Dad!, The Cleveland Show, and Cosmos: A Spacetime Odyssey.

[citation needed] Vallow then went on to Sony to produce their first primetime series, Dilbert, with Larry Charles, which ran on UPN for two seasons.

In 2004, Vallow created and produced the animation sequences in the critically acclaimed and award-winning documentary In the Realms of the Unreal directed by Jessica Yu.

and an untitled Phil Hendrie pilot, before Fox made the decision to bring back Family Guy for an unprecedented 35 episode order.

Nominated for five Emmys, Vallow was at one time responsible for three half-hours of programming on Sunday nights: Family Guy, American Dad!, and The Cleveland Show.