Probably picked up by animal control as abandoned and euthanized.

That’s really horrible. I’d prefer to know rather than guess at that.

It's pretty common when a dog is abandoned. Likely her children couldn't afford to care for it. I suppose there is a chance they put it up for adoption (same outcome is likely).

Sorry. I really fucking hate this. I don’t imagine there is a charity somewhere that works against this?

No large scale orgs that I know of. Our local bar has an attorney who does work against it, she has her number at the jail where other inmates will pass her number around if some mentions their dog, and intake officers will often suggest to inmates that if they have pets to call her. She is absolutely the most hard core lover of dogs I have ever met, and she will literally drive/run into danger to get to a canine to get it to a local non-kill shelter.

I imagine if there had been anyone intervening in her favor it would have been to resolve her case faster than 5 months.