forage

Short definition from Wiktionary

Noun

1. 1
   Fodder for animals, especially cattle and horses.
2. 2
   An act or instance of foraging.
3. 3
   The demand for fodder etc by an army from the local population.

Verb

1. 1
   To search for and gather food for animals, particularly cattle and horses.
2. 2
   To rampage through, gathering and destroying as one goes.
3. 3
   To rummage.
4. 4
   Of an animal: to seek out and eat food.