I have a lab and a pointer. They are in at night mostly. My neighbors dogs (3) do a lot of hunting around here and have never caught a nutria, they do catch armadillos, coons, rabbits, etc.

Nutria's are mainly out at night, are usaully in the water and can spend a long amount of time under water to avoid trouble.

Now my lab is great when we go out in the boat to hunt for them. He will get on the bow. If I troll around slowly all I have to do is watch him. He sniffs them out and I take the shot.

I've been told the only way to controll their pop is yourself or get an alligator.

Good luck