My two pennies ...Rural men live their lives with a more practical views on euthanasia. The choice of laying in a hospital rotting away with cancer or sent to a Long Term Care facility to die a slow useless life can be solved thru suicide.
I don't know many locals that take a dog into the vet to be put down, it's far more natural in a rural area to do it yourself and since more rural people have access to firearms the choice is easier.