You have nothing to offer no more. Your corn's torn apart. But they don't have something to offer either. Their unable to raise corn.
Whatcha gonna do about that?
Oh, look, there's another rat roaming around. Another uninvited dog visit is on its way.
For unclear reasons I was trying to understand why they behave in such an aggressive manner. But, in the end, failing in this attempt, I must say, their motives do not matter any more. For us - do not matter any more. It's kill or be killed. As simple as the fatness of your mother.