No matter what anyone says, like you mentioned…. a couple of weeks ago, things were SO desperate for Spencer! Thankfully, things are going to improve for him. As my Mom would say when I was growing up: "Kill 'them' with kindness". While the lady was obviously rushing to judgement, it may have taken her a lot of nerve to step up and "protect" the skinny innocent dog that she saw at your side. I would be shocked and stunned, too, but for all we know, she was Michael Vick's neighbor and vowed to herself to protect the next innocent dog. And like you mentioned, you will be better prepared for the next person, so that they can understand that the Spencer they see is, in reality, the "after" picture.
Whatever... I feel so blessed that YOU found an answer for Spencer's illness, and that when the "experts" told you to let him go, YOU didn't give up and YOU found the right answers to keep him going! You've restored my faith in mankind, because you found the hope that no one else would help you find.
Spoil him rotten, within limits, of course.
Hugs and roos-
Patty