duke - Reading this link with interest also. I have a one acre Wildlife Impoundment (Fancy name for a pond, but it got me a 50% grant to build it) and only one rat that I'm aware of. My yellow lab loves the water and has tried to catch it but cant. I've tried to wait until it surfaces then use the .22 cure, but can't catch it. Took out my dam once by boring holes in the dike - high water washed it out. Repaired the dike and that magic rat is back again. Noticed that the cattails are rooted up - didn't realize that they ate them. Hesitate to use any chemical that might harm the ducks that nest in/near the pond. If you come up with some sytem that works, would appreciate if you'd post the method used - darn rats.
penokee /forums/images/graemlins/smile.gif
Ps: I hesitate to ask the DNR, etc. for help as they'll always be nosing around after that. Too much Government.