Rats ARE very wary, AFTER the fact LOL. I only purchased the electronic trap when all the other traps failed ie; standard snap traps baited w/ cheese or peanut butter, glue traps work well for mice, but not rats. Various poison baits, they get used to those and then avoid them altogether after awhile. Cayenne pepper works for mice, but not rats. (It worked on me too.)
What truly works and deters them for months are ammonia soaked rags hung out on the chicken wire around the pen at night. Then removed the next morning before letting birds out in the mornings. Do that for 3 or 4 nights and it's bye bye rats. The ammonia fumes burns their sensitive noses. They remember that! Wear a mask and those yellow gloves (forgot the name) when setting out ammonia soaked rags. I use a 5 gallon bucket to soak the rags.
What truly works and deters them for months are ammonia soaked rags hung out on the chicken wire around the pen at night. Then removed the next morning before letting birds out in the mornings. Do that for 3 or 4 nights and it's bye bye rats. The ammonia fumes burns their sensitive noses. They remember that! Wear a mask and those yellow gloves (forgot the name) when setting out ammonia soaked rags. I use a 5 gallon bucket to soak the rags.