Surely if they were surviving, they'd eat kills....instead they kill en mass and leave them.
They only kill like that when they encounter livestock in un-natural numbers , they go into a frenzy, killing, half burying the bodys , biting heads off . They are only acting out of an instinct to kill now and try to carry off and store for later . But all too often all that we see is the carnage thats left , and we compare a wild animal with our own morals and just see wanton destruction .
I used to take fox kills really personally and see to it that i got revenge . But the years have made me more philosophical , and while i do deal with problem foxes , its not personal,and i dont seek to destroy them all .