I just put out 4 of my duke dog proofs today. This was my first time. I put a cotton ball in the dp and hit it with mayple syrup,peanut oil mix. Then i added a little dog food mixed with tuna fish and syrup. I'll let you know what happens.
Ive just been using 1 marshmallow under the trigger, and one stabbed on the trigger. Squirt a line up to it with fish oil and thats that. Had multpule repeat catches without adding scent. If i get bait stealing mice I stick a golf ball on top which seems to do the trick.