(1) Read the rumen. Start by examining the contents where the esophagus enters the rumen-the first of the four stomach chambers-to determine the deer's last meal. Then work away from the esophagus, noting the condition of subsequent layers. (The longer food is in the rumen, the less it resembles what you see on the ground.) Look for soft mast or browse, such as mushrooms, leaves, and fruit. These foods digest quickly and evidence of them indicates recent feeding.