Now looks like the shelter PTS her dog by mistake but tried to cover it up. No, no no! She should be compensate in some way. Personally, rather than get the internet crazies involved, I would think it's better to get an advocate:
What’s your problem?
If you're having trouble with a business - any business - and you've reached a dead end, maybe I can help. Send me an an email and I'll investigate. (I can't promise a fix, but I take every request seriously.)