I found mouse droppings in the bottom of my outside grill about two years ago. I had left the grill uncovered so the only other option was using D-Con. It works, a few droppings at first next to the bait, then no more after that. About a month ago I opened the lid and a mouse took off in a blur. I looked in the bottom and the D-Con was empty, put a new D-Con in the bottom, no more sightings or droppings. If you have a dog or cat, don't let them near the D-Con.
