We came home to a dead duck and I'm now wondering if one of the other ducks could be the culprit? The only wounds we could see were the ones on the back of her neck. All the feathers were pulled off the back of the neck and the flesh was chewed a little bit. There was no blood anywhere. While the ducks (all hens) were swimming today I noticed one duck was dominating another one for a long time. She was grabbing her on the back of the neck (where the other one had wounds) and even holding her head under water. Could this hen have killed the other one? Maybe not on purpose but just a freak accident? We thought it might have been one of the dogs but now I'm just not sure. Any thoughts would be greatly appreciated.