I have used the bait chunks by putting them in pieces of PVC pipe small enough only the mice can get in. Most were coming up empty every day so I put my trail cam out to watch and a raccoon was upending them and eating the chunks many per night for several nights, didn't seem to affect him. I then drilled a hole threw them and spiked them to the ground to stop the raccoon and they seem to stay then but also didn't see to attract any takers. I use sticky traps primarily in my shop and camper work well. I did have two large rats chewing wiring in my van and would chew off the leads to my battery charger. Finally caught one in an industrial strength sticky trap that I had in a tunnel made with 2 cement blocks and a piece of wood on top, weighted down so I didn't catch a skunk or something else I didn't want to catch. The other I caught in a rat mice spring trap. I bated the sticky trap with some mixed nuts and the spring trap with cheese.
