Actually we have a local rule here, if your shot hit's a kangaroo on the fairway you're playing you can elect to replay the shot without penalty.
I know that might sound harsh, though it happens rarely even when there can be mobs of 30 or more within range, that said they are really tough I've seen a few hit by a golf ball that would have seriously dropped a person and usually they don't even flinch much at all.
Oh, ball stealer's, that's another local rule if you actually see a crow or a kookaburra, steal your ball you can take a drop at the point of theft without penalty, they can assume it to be a fallen egg, though this does not happen often, maybe 4 years ago was the last time one of mine was stolen.