hi , this looks like a rather heavy thread for my first post , human and dog attacking coypu .......ive heard it all now !! lol when was the last time you heard of any non meat eating creature going on the rampage ? i spend a lot of time in france and hope to live there soon , ive seen loads of coypu and i can tell you given the chance they will run a mile at the first sign of humans or the dogs ! so you can forget about them attacking you , as for dogs well ive no doubt that a coypu would try to stand its ground if cornered by a dog , what animal wouldnt with no other choice ? haveing said all that , coypu are a pest they do a lot of damage and do need to be controlled i beleave the french blow them up in the far south . born to fish , did you say you was a fishery manager ? do they teach you to kill herons now ? do they teach you to upset the natural balance ? what about the birds of prey that hunt fish ? what about crested grebes they hunt fry ? what about coots they eat fish spawn ? all of these freshwater birds are part of the natural balance of any lake , take them away and you get problems . as for cormorants well they are a big pest and are not part of the natural balace !!!!!!! other than that good luck with your move