@ladyearth just a small point, owls can not pick up 3 times their weight. Neither can I. I'm thinking you can't either... that would be like, what, about 300 pounds for me?
I'm afraid you were misinformed. What owls CAN do, is to sort of "butcher" their kills. They have to leave them right there, but they can saw off part of the animal with their beaks, and then fly off with that, they come back, saw off more etc.
I called up an expert on this once, because a neighbor told me that owls can fly off with an adult cat. I highly doubted this, since the cat weighed so much more than an owl. What I learned was that owls become expert in certain prey, so there are owls who for example, specialize in killing cats. However they can NOT pick them up and fly off with them. They kill the cat on the spot, and then start taking the body apart. They start with the head. They sometimes find owl nests with like, 50 cat collars in them. That's actually pretty fascinating... and it's also the reason my pet cat never goes outside! (Well, it's the owls, the coyotes, the dogs, and the fact that I live RIGHT on a highway, as well.) I find raptors fascinating, they are amazingly intelligent and highly adaptable birds, they are even learning to live right in cities and so on. Even though I think they are wonderful animals, I still don't want them to eat my chickens, so I just stick with the covered run strategy. So far that works pretty well for me.