I went and read about them, they will work but there is one condition. The
rats have to be in the burrows. I also didn't see you say where you were
from and there is a possibility you could be dealing with Roof rats, they
climb instead of burrowing. If so then you would be wasting your money.

I wish you all the best

Tim W

www.onepest.com

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Proud Charter member of the IPCOnetwork. Find an exterminator you can trust
at www.ipconetwork.org.