My dog is 10.5 years old, cocker spaniel. Vet told us he thinks its kidney failure. He is really sick and been told to prepare for the worse. His blood tests have improved a little on the drip but he is very ill. A slight improvement from this morning to this evening but still not able to pick himself up or to lift his head for long (slight wag of the tail when he saw us but not himself). The vet seems very much of opinion that we should let him go. We've left it another night to see if we can bring him home. But I want to be 100% sure it's the right decision but clearly don't want him to suffer if he has no quality of life. Any thoughts?