I know rock salt is not good to sprinkle around the duck yard, but I am in the midwest and there is a 1/4 inch of ice on EVERYTHING including the duck yard. My poor quackers didnt have any footing all day. It was very comical but putting them back in the barn, up the 9 degree incline, was nearly impossible. I was wondering if there was a duck safe snow melt out there somewhere, or should I just stick to sand? Thanks and have a Happy Holiday.