Seems to work
We have a terrible rat problem in Crown Heights Brooklyn.  I've gotten an exterminator who has used bait traps wooden mouse traps, cemented up holes, used chicken wire, put down wolf urine.  Nothing helped.  The rats party under my Toyota in the driveway and nest on the engine block and eat the wire casings.  After replacing the wire harness for 7K, I ordered Grampus Gus' pouches and spray.  I also sprayed down the driveway with ammonia. Fingers crossed, but they have stayed away for over a week.  I'll need to replenish again, but so fatlr this has been the ONLY thing that's worked.
Rating: 4 stars