[[[[[[.........Where do they cache the uneaten portions of prey? ........]]]]]
The Great Horned Owl who lives in my yard prefers rabbits. I find back legs and chunks of rabbit fur draped over the top of my fence, at the corners where there is a bar on the top of the fence.
He will take jack rabbits. The jack rabbits here are enormous and extremely fast. They will be in the road and run right down the middle of the road in front of cars, so I clock them at 25 miles an hour. I frequently mistake them for coyotes in the distance because of their color and size. I have to look carefully to see that they are jack rabbits. They present no difficulty to the GHO. He eats a lot of them.
Because of the GHO, my birds go into covered runs at night. In 10 years time, the GHO's in my area have never bothered my birds or my very small dogs. But I take care of my animals and the owl does not have access to them during his hunting hours.
The owl lives in a tree just behind my orchard where the birds are loose during the day. He will sit on the power pole next to the orchard and he likes the trees right next to my house. He will come and sit in those trees during the day and watch me doing chores. I just ignore him.
My son has been twice and shot at crows that were mobbing him during the day. The crows kill my birds and steal eggs, so they are not welcome here. There aren't too many opportunities to shoot crows because they are very wily. But when they mob the owl, they stop paying attention to what is around them and it is possible to shoot at them. Other than that, we ignore the owl. After the crow shooting was when the owl started to perch in the tree by my house and watch me. I don't know if one has anything to do with the other.