Poor Dawgy.
Yeah, it's a damn shame someone took the time, effort, and money to (a) get a dog's health back, (b) attempt to find someone to adopt the dog, and (c) fall in love with the dog enough to want to keep it.
I am no fan of Miley, but I would give her a pass for this. Even if the net result ends up being she finds another home for the dog down the line, she may well have saved the dog's life.