I am no baiting expert, but I would say cutting down the amount of bait and putting it out as early in the day would make sense to me. You are forcing them to come during the daylight hours and also forcing competition between them that can only speak for the largest laying claim to your bait pile.
Good Luck and let us know what happens!
Greg
"Getting close to the game is the joy of Bowhunting for me, the harvest is a bonus."

Live 15 ft Python after eating a small Antelope!