Cow and Chicken (1997)

Season 3: Episode 8

Cow stays outside too late, and pretty soon finds herself lost in the woods, and tries to survive. She pretty soon comes to the conclusion that it's eat, or be eaten, so she puts on war paint, and finds a squirrel in a bush, she quickly eats. It turns out she was in the backyard all the time, and her imagination got the better of her.