Poor little Snickers....and poor you. That is a lot for all of you to go through. He is very lucky to have you and your husband! You are correct that many people would have given up.
Given that he has MVD in addition to the GI problems, managing him might be tricky; but I am sure you will be successful. Listen closely to your vets!
The only thing I might consider if I were in your shoes, is a board certified veterinary nutritionist.
I know it is difficult when they are ill, but it is important for them not to know that we are worried....stress just increases their illness. It is also important to find a schedule for feeding and everything else....dogs do best in environments where there is less stress and where they know what to expect.
I will pray for your little guy and look forward to updates on his progress.
