I have to admit I'm smiling at this image. Will you wait for an owl then throw out one mouse, or a whole boxful? Won't the birds be a bit leery about swooping down on a mouse just after you've winged it into the air? (they're kinda scared of humans). Or will you have the mouse tethered to a little pole out in the open while you shoot from a blind? Just kidding ;o)

Out here on the coast (Vancouver Island) I've had success at getting Bald Eagles to come down for herring chucked up in the air. I wasn't taking pictures though. The problem I encountered was in keeping the mad seagulls away once they figured out there was free food available. Good luck with it, Raptor. Let us know how you get on. I'd be interested to see the photos, too.