Bests & Worsts Reviews from Amazon

Roof rats love this stuff. They carry it off to other hidden locations so just because it's gone doesn't necessarily mean they've eaten it all. They will stash as much as they can away in a location not too far from where you set it out but it'll be hidden good. So, if a big pile disappears but you still have rat-tivity for the following week it doesn't mean it isn't working, it just takes a little time for them to consume it all. Seems to take about a week to be effective for high activity areas. Afterwards it's good for "Monitoring" areas for activity. Just keep a few pieces in strategic locations and keep a watchful eye out. I've tried MANY things and this has worked the best for me for Roof Rats.