I spent a few years working at an old steel mill. It was located along a river. I never saw a single rat the whole time I was there.
But we always had to approach the garbage cans carefully. Because the chances were fair that there’d be a raccoon rummaging around inside. And those critters sure didn’t like to be disturbed.
You’d think the mill would have installed raccoon-proof garbage cans. But they never did.
They got attitude too. I remember years back taking some garbage out to the trashcans of a house we had rented. As I approached there were three or four raccoons combing through the cans. They didn't run but just turned around and looked at me like "What you gonna about it punk".