Here a bed of aflafla hay with oats, peas or barley on top is the common baiting practice. Also a cobalt or minsalt block added to the mix.Something newbeing used around hereis a protien/mineral block for deer and elk. Ita nutrient/mineral supplementthat supposedly promotesantler growth as well. Should be available at farm centre, it's called Cerviddelite and comes in 25kg block or 8 sectioned blocks I believe. Not real cheap but it lasts longer than loose food. I know a number of guys who say they deer just hammer the stuff. Molasses based product so it has some smell to it as well, might be worth a look into.