Driving Six White Horses is a methaphor for the front teeth. AKA ... she will be "HUNGRY." Hence, the killing of the old red rooster and dumplings - yummm yummm.

A parralell is found in the Nursery Riddle "Six White Horses on a red hill...first they chomp, then they stomp, then they stand still."

Sincerely,
Gargoyle

I could swear I posted the same answer nearly a decade ago.