Mike, I have never seen a dog verminate so well.
We were getting rats under our house. Before we got her, we hired a company to seal the house up. The service came with a lifetime guarantee.
Well the rats kept getting back in. The company that sealed the house was perplexed.
Right before Christmas I was noticing her rooting around in the ivy around the house night after night for hours at a time. The area is thick with trees and there is a concrete path between the ivy and another planting area next to the house.
After a couple of days I decided to see what was keeping her so busy. I was surprised to find two big dead rats in the ivy next to a tunnel. Dixie had her head and shoulders in the tunnel with her little butt and legs pressed flat to the earth.
The next day I called the rodent exclusion company and they pumped smoke into the tunnel . Dixie had uncovered an abandoned gopher tunnel that led under the house and exited under the lip of the rim foundation. The opening was the size of a silver dollar and the rats were using it as a highway.. The company serviceman said they would have probably never found it. They pumped the tunnel full of grout and we haven't had another rat since (knock on wood).