I know you weren't addressing me, but it is an interesting question to me: Where to draw the line?Out of curiosity, when would the worry of an animal in "misery" come into play for you? A rat? A rabbit? A ferret? A cat? If we talk about "feelings", turtles also don't have "feelings". I've grown up receiving grief from others for trying to save things that aren't worth saving. Always interesting to see where people draw the line.
For me, I have to intentionally detach my emotions and heart strings and engage the logical portion of my brain. Is this animal suffering? Is there any chance of survival/recovery? Is survival/recovery likely? How much pain and suffering will be incurred if there is even a chance of survival/recovery? What will happen to the animal if it does survive or recover? What kind of life will it have? Is it a pest species? Is it an introduced, non-native species that shouldn't be loose in the wild anyway? What is the best course of action I can take for this individual animal? What is the "right" thing to do?
Everyone is likely to have different answers for each of these questions, but these are the things that run through my mind when confronted with a situation like this. I have seen some people that I think were too quick on the draw, and I have seen some people who let an animal suffer too long because they can't overcome their own emotions. I try to exercise caution and be thoughtful about this sort of thing. I hate killing animals, but I hate letting them suffer unnecessarily even more, so I do what I have to do, and I do it correctly, quickly and as humanely as possible. Doesn't matter if it is an ant, cockroach, mouse, dog, horse, ground squirrel or gopher.