I’m so sorry about your dog, Guinness. You did what you thought was right for your girls and your dog. I know it was a hard decision as it was for me when I had my kitty euthanized. I, too, felt that I did it too soon but I am comforted by the fact I saved my cat so much further pain. If you had waited it could have resulted in a very bad situation. I understand your heartbreak so well and the guilt. But I can, also, tell that you loved Guinness very much.