An update, not that anyone asked . . .lol. We bought what was supposed to be a full-blooded, eight week old, Pyrenees (Rufus) on August 8th. He's been in the pen with our buff ducks ever since. He's amaziing to watch and I would LOVE to get inside his head!! He has yet to kill or mangle any of the ducks (knock on wood) although, he has had a mouthful of tailfeatthers a couple of times. I will sit in the pen with him and play Alpha dog. If the ducks try to mate and the duck is throwing a fit, he will walk (or lop) over to them and break them apart. If two are squabbling, he'll break them up as well. Some times, I've seen him, after he breaks up the racket, chase the male under the duckhouse. And, if they are in a blindspot, he'll run over there and put them where he can see them. He's very interesting to watch.
I don't trust him 100% yet, and I know that eventually he will run the property, so my main concern right now is making sure that he thinkis of the ducks as "family", if he thinks about them at all.
He goes back to the vet this week for his 3rd round of puppy shots and I'm curious to see what he weighs.