I don't want to appear like I'm displaying acceptance of rats in foodservice locations. Customers should be concerned and alert whoever they see fit-beit management or H.D.
The reality is, as noted above, in the urban setting rats are a part of life. With all due respect, soap and water, while obviously a necessary combo for any restaurant, doesn't necessarily have anything to do with it. Rats are seeking food, not dirt. They will enter spotless kitchens, unfazed by Mr. Clean.
I would be very interested in what exterminator service is effective-tried them all-same story. My experience has been-once you have rats, the customer is, for the most part on their own after a few traps are set, and they point out where they think the entrance is.
Of course everything must be done until the rats are caught, but this is not necessarily easy. Rats are smart and resourceful, often laugh at the traps, and can chew through most anything. Making food storage rat-proof alone can be an issue, and it is amazing what they will eat. The physical space of the restaurant and the basement can be daunting factors.
Again, it is the restaurant's responsibility, and I'm happy that some have found it "not that hard", but that ain't necessarily the case. Maybe I've just been in some tough physical spaces, and have encountered Einsteinish rats...
I love animals...they're delicious!