Simple Simon wrote:

Intended use is a big factor. To be considered
reneging one must breach a promise - one makes
no promise of sanctuary to farm animals raised for food.

Then we're in complete agreement. I make no "promise" when I to buy a
cat to catch mice or a dog to bark intruders so if either fails to
perform then I shoot them with no more guilt than I'd have for killing a
cow, pig or rabbit. Similarly, if I breathed enough carbon monoxide
laden city air or did drugs til I become addle pated enough to seek a
cat or dog's companionship then all Ie promised to provide is a quick
death when I recover my sanity and my unnatural need ends - right? So
what are you sniveling about?

A couple I know went nuts when their kids flew the nest and bought dogs.
Shrink says THEY need something that needs them to survive. Jeeze they
even let them sleep on their bed! Can you imagine? They wouldn't let
their kids do that.