I have never had to put a dog down, and i doubt i will ever be able to, (thats why cant ever be a vet), But what my neighbors have done befor is have someone do it for them. Someone to bring their dog to the vet. I think im going to have someone else bring SimSim to the vet, because i could never do that but, hopefully that wont be for a loooooooong time till that day comes.. Just remember, she lived a long happy life and you lead her threw it, and now it is her time.