We havent had trouble with weasel-type predators (knock on wood!) but lost a few last year to hawks. We had a nest of them right across the street from us. We strung fishing line all acorss the yard and I hung cds from that that spun in the wind to scare them off too. Once we did that we didnt lose another one....but we really did look like everyones nightmare of a crazy neighbor!
Nice to know that worked, despite the crazy neighbor image! I haven't had trouble with weasels yet, but I know they are around here. I used to have a cat that would catch and release in the house (alive) all kinds of animals. I kept hearing a noise in an upstairs room, but never saw anything. I complained to DH, but he never even heard anything and said I was imagining things. One morning while I was lying in bed, I heard something again in the next room, and yelled to DH that something was moving around in the other room at that very moment. He came upstairs to prove me wrong, and when he went in the room he let out a shriek. It was a weasel! It was quite a chase, but we managed to herd in downstairs, and eventually out the door. 