They way I have heard it and it makes sense to me is when it is a full moon the animals will feed at night and sleep during the day and when its is no moon or close and they cant see the sleep during the night and feed during the day. But like my Grandpa always says "They are going to do what ever they want too." And he also likes to say when you see tracks its a buck unless you saw a doe make em. lol Hes quite the hoot to talk to.