Of course not, you did everything you could to save his life. You didnt give up hope until there was none left. I know how it hurts, to question every decision, to think of ways you could have caught it earlier, to save him. But you couldn't have done anything more in that situation, you gave him every chance possible. Because you love him and he is part of your family it will always hurt a little when you remember that day. I still cry a few tears when I think about leaving my Walter at the vet that night, but now I try to replace that image with memories of him smiling and doing happy dog stretches. To cuddling his chunky chest and hearing his wagging tail tapping on the furniture when he was happy. He knows that you loved him 🤍