cg,

Here is a link to an old otter thread.

Pond Boss - Otter Thread

The OP thought he had one otter, and got at least six!

Another poster is pretty sure they cleaned out both of his ponds.

However, there have been many other posts of otter wars where our side won!

I'll see if I can find any of the good ones. (Some of them are in the long-running "What did you do at your pond today" thread, which is harder to search and link.)