The RSPCA are utterly crap.
Yes, she shouldn't have fed the cat human painkillers but she was trying.
Whenever I've reported animal abuse they sound completely uninterested.
And don't get me started on their ridiculous criteria for rehoming pets and then moaning that they're over-run. The couple who adopted two kittens from me were turned down because they smoked. Outside, because they have children but the RSPCA still turned them down.
They were a lovely couple too.