If I were you I would clear the pile of bait up that you have put out,then what you need to do is put the bait in different places around the loft in smaller piles,you will probebly be better off putting the bait in to small containers( cut yogurt pots about 2cm and use the bases as little trays,this makes it easyer to move about and you won't have poison every where).Place the baits as close into the sides of the loft walls or tile as you can.The reason why you put out quite a fw baits is because mice are naturally nervous eaters,they wont just have there fill from one food source they have a