All 3 Uses

forage
in
The One and Only Ivan
(Edited)

After our show, humans forage through the stores.
p. 13.1

forage = search for and gather desired things
And for the most part, we were happy to do what we were meant to do: to feed and forage and nap and play.
p. 126.6 *

forage = search for and gather food
At night, lying alone in my Pooh pajamas, I felt hungry for the skilled touch of a grooming friend, for the cheerful grunts of a play fight, for the easy safety of my nearby troop, foraging through shadows.
p. 133.6

foraging = searching for and gathering food

Definitions:

(1) (forage)
to search for and gather -- often food and provisions
(2) (meaning too rare to warrant focus)
More rarely: Forage can imply taking other's food or supplies as when soldiers forage on nearby farms. As a noun, it can reference the items found. Finally, at times (especially in classic literature) it is used in reference plant material eaten by animals.