I am about at 230 rats. In my area alone.
We had a neighbor who we found out horded food in his untight garage. They were about 4 doors down from us. When I started seeing evidence I tried everything....
Snap traps - 8 rats for me least effective.
Coni 110 - 13 rats I hit funnel areas
Bait stations - I would guess about 40, neighbor dogs found some, I found some, found some in the road ran over, and a few just wandering around in a daze.
Live traps double door blind sets !!! 170 or so...lost track. I would use whatever size I found here is a list
http://www.acehardware.com/product/index...ASABEgLgNfD_BwECaught a bunch in this smaller size
But the larger the trap the more I caught
But then I caught...skunk, birds, grinners, squirrels, and lots of rats...lots.
Then one day the neighbor was talking with us...he told us he had lots. No wonder...garage full of food...pallets worth. He had it emptied and the rats stopped. I catch a few here and there...up to 8 since the first of the year.
But I learned....blind set along buildings, fences, and any edge for them to follow.
Good luck....kill em all