It is so hard to lose a beloved pet. And does take alot of time to grieve. We will have to put our doggie to sleep in the not too distant future since she has cancer and it will eventually get to the point where she will be in pain. So far the 2 vets I take her to have agreed that she is not in pain and is still interested in life. You did not let your dog down but did the most loving thing you could. I hope you can remember the funny and good times that you had together and smile. Take care.