I have a whopper of a snapping turtle that comes around when I broadcast (hand feed) my fish.I just let him eat as he comes up near the bank and eats what falls in proximity of the weeds and bank. I just can't bring myself to dispatch his/her old butt...guess I'm getting softhearted in my old age.
Muskrats are a different story, I been popping them when I can, after dropping a Snapper mower wheel in one of their burrows.