WOW... sorry to start a rumble.
To answer some of the questions:
The chickens are in their coops and have a small area of 2x4 wire to stick their heads out.
The attacks are during the day. Coops are inside, back wall of barn.... no predators in there, except the dang drake.
IF there was some outside predator out there I would know about it. I work from home and have someone here 95% of the time, barn is approx 100 ft from house.
I have SEEN this drake hanging on the tails of some of my BIG roosters and tearing out feathers of others.
I have seen him chase off smaller & younger chickens and YES kill a 3 month old Austrolorp chick, I passed it off as a fluke.
Just grabbed its neck.
He patrols the back isle...chickens flee from him.
He does not follow or hang out with the other ducks. over 20 others, different breeds
I have 1 other Muscovy drake "Haggard" with 5 hens. They are in a separate pen. ALL are sweet as sugar, eat from my hands, follow me around etc. I have hesitated moving him in there with them since he seams so rough with the other birds. Glad I haven't.
This morning he was flogging (duck style) the Muscovy pen.
Not sure that covers everyone's question & concerns. I am not trying to "paint a bad picture" of the breed. Like I said, I have 5 other Muscovy that are WONDERFUL.
I just want to know if anyone else had a rouge Muscovy drake, attacking their other birds. I see that some do, so have my answer.
THANK YOU ALL for your answers.