"brooklyn1" wrote in message

... but they must have a steady and
adaquate food supply or they'll move on. By all your machinations to
rid yourself of rodents it's obvious that you are feeding them.

A rat should be able to find food in any area where a human lives regardless
of cleanliness, water or (visible to humans) food. Rats are great survivors
and anyone who thinks they don't have rats is probably just not seeing them.