They move around looking for places with food. Once they eat out a place they leave for a while. Sooner or later one will come back to check for food sources.
Then I might as well quit feeding my BG that are left and just let the ponds be as they will.
The otters went across an open field and climbed a small hill to get my neighbor's catfish. I saw one flathead carcass by her pond that must have been 20 pounds live weight.
I have not heard of otters causing problems in this area before last winter.