a breeder i use to visit a while ago was amazed to see an owl keep visiting his garden one day he followed it down to teh bottom where his pigs shed was ( a big old caravan) and saw the owl go in the skylight and take a baby pig out, it had eaten the wiring over the skylight, :'( :'( I cried myself to sleep that night it affected me so bad
I have also seen a magpie attack a young starling down a lane where i use to live next thing i know I'm chasing this damn bird with my babys buggy screaming all sorts at it, I know starlings are nasty to younger birds but this one was not going to be killed in front of my eyes, it was fine and eventually after catching his breath flew off ,