unfortunately chea, when you mentioned the humane society shelter that you work for that brought up a red flag. no one will adopt out a dog that is going to a humane shelter, as they do euthanize. this woman wants to make sure that minnie does not get euthanized, so thats why she told you you would have to adopt her directly or go thru a rescue, as rescues dont euthanize over space . while i know your shelter wouldnt euth her, the woman can not take the chance.
if a rescue gets her and puts her in your home as a foster thats another story. or, ifyou out and out adopt her yourself under your personal name, then she will let you have her.
try to understand her point - she is trying to have minnie get the best chance possible.