Unless you are "open carrying" a firearm, (and if you are not a uniformed LEO, you are probably not) you will be drawing from concealment, and that dictates that your firearm be as "snag-resistant" as possible (bobbed hammer).
Practice, practice, practice double action shooting and if that scenario arises where you need to dispatch a rabid animal at such a distance that requires a carefully aimed, single action, precision shot, you will have more than enough time to cock a bobbed hammer.
John
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