KG8, I grabbed this from an American government website: "In 2001, 55% of suicides were committed with a firearm (Anderson and Smith 2003)." The ease of committing suicide with a gun makes it a prime candidate, if it is available.
With regard to wild dogs, my father worked alone in the bush for much of his life and occasionally saw dog packs, but they were always timid and would quickly disappear. I suppose they might be more aggressive bordering major cities if dumping of more aggressive breeds is common.
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