I disagree with david. Cutting the stomach open will tell you what the deer did for theprior 24 hours, food sources can change for deer on a day to day basis and this info willallow you to set up on that food source they are curently on. I was hunting in Will County Illinoiswith a friend about 8 years ago, he shot anice ten on 300 acres we were on, we cut the stomach open, it had nothing but acorns in it. There were no oaks in this wood lot (that I knew of)so I started looking around and I found a smallhillside with about five acres of white oaks and after I set up, it sounded like rain with all of the acorns falling--I didn't know these oakswhere even there as it was our first year in on this ground. I set up in the oaks that night and shot a 147 inch11 point. I would not even have been looking for those oaks if not for the tale my friends deer's stomachtold us. I've seen deer gorge on apples, maple leaves, etc, etc. Knowing the food source of choiceat seasonal changescan be a great learning tool.