Mid-day

Many hunters are under the impression that big deer only feed at night. While deer are primarily nocturnal, they can’t go all day without feeding. The demand for nutrition is just too great. A buck must feed at least every couple of hours, even if it is a small amount. A deer is most vulnerable when feeding and they eat very fast. During the day buck will bed right in a food source if possible. He can stand up, feed for a few minutes, and lay back down without much movement. This has been the undoing of a lot of bucks.
Jim
http://www.amazon.com/Blood-Tracks-Mule-Deer-Manifesto/dp/1470168987