I think it is a way of setting up a larder of food for future meals. The fact that farmers clear up the mess is not part of their evolutionary memory.
Foxes do eat chickens, given the chance.Yes
They dont, because you obviously left the fox with the grain on the other side of the river.
Mice
yes
Not sure what you are referring to. A fox just like any other predator does indeed eat its prey. Foxes will often cache their kills when food is plentiful, burying it instead of eating it right away. They also often play with their kill before eating it. But they will eat it eventually.
Foxes will eat any bird they can catch but this is usually limited to ground nesting birds.
chickens, anything dead or anything small. they are scavengers.
1 every attack. But the fox will keep coming back until all of the chickens are eaten.
No, owls can't get in there(the ones big enough to eat chickens) but foxes and cats most definitely can.
No, if they have killed an animal that is more than they or their family can eat, they will cache it to eat later.
yes
If a raccoon is solitary and not especially hungry, it may only eat the head. If it is a group of raccoons they may consume the entire bird.