There is much honor to be found in fighting the good fight...there is tremendous hardship and confusion to be found when we can't get what we try and wish so hard for.... Your spirit and 'heart" are all in the proper place. I only so wish we had a "magic wand " at times. Regardless of how this unfolds, it seems you have a big heart, your pooch is fortunate because of this. Let your conscience be your guide. There are no easy choices....just selfless ones which are sometimes the toughest to make but perhaps the kindest to our ailing furry friends.