I agree with what someone said in an earlier post... I think our pets often hold onto life just to please us. Humans will sometimes give up and just let go when they feel their time has come, but not a dog. I never knew a dog ever who went quietly and quickly. They will hang on and crawl to your side to be with you. Sometimes the most humane (although difficult) thing to do is help them along the way in their final days - just to put them out of their suffering. I hope that you are at peace. I know Sadie is!!!