Several yrs ago I did a hail claim for a fellow up in the Swan River Valley,MB.
I was chatting with him before I checked his fields and he started telling me about his problems incl a bout of cancer, a recurrence of cancer,and wife leaving him after he was told about the recurrence.
He said what was really bothering him was the noisy ravens in the morning, to a point where he could'nt get enough sleep. He had been musing on a solution and figured what would work would be to set a propane tank out in the field, wire a bunch of meat to it, and then pop it with his rifle when there was a good enough concentration of ravens on it.
I mentioned the native superstition about bad luck after killing a raven, but told him that in his case, it would probably be OK.