Are there any respected poskim who would permit killing (with a shinui) a bug or other small creature who is clearly suffering terribly on Shabbos?
If not Shabbos, what about Yom Tov?
If not killing, is there anything else you could do?
Please don't judge me for this question. I understand the answer would seem to be "no," but I also have faith in the power of creative poskim to find a part of the Torah on which good and sensitive instincts may stand.