The lady said that she is gone and not coming back so I don't understand why you're apologizing to her, she'll never see it. As for me I will live my life my way and if anyone is offended it isn't going to draw an apology from me. Somebody somewhere is offended by something at any given moment of the day, this was just her moment to be offended by you living your life your way, I'm sure by now she has found someone else to be offended by or perhaps someone else has found reason to be offended by her. Live your life your way and don't waste your time on those who would try to rule your life with the guilt they try to push off on you.

Exploiting animals in order to use their dead bodies as decorations is vile and despicable. There is no educational value in displaying dead animals or their body parts in your home. Calling hunting “conservation” is an oxymoron. Historically humans have decimated thousands of species of animals by hunting them to extinction and disrupting the natural balance of nature. The fox in your display was not killed for meat, only sick human pleasure. Would it be moral to stuff and display your pets after they die? Or mount grandmas head on the wall for the historical value? There is no difference.