I'm so sorry to hear about Panther's passing. As others have said, please don't beat yourself up with the what if's. I also did this for a long time with my Pepper. I finally found closure by asking a pet psychic about him and was told that I did the right thing. My Pepper still visits me and I hope that Panther will also continue to visit you. If you need to talk you can pm me any time. Panther knows that you love him and he's now no longer in pain. RIP sweet Panther. Please take care. (((HUGS)))