Hopefully you can catch the other cat she is feeding...maybe later when Fatty is fixed up.

It's the weekend, so wait til Monday and a couple more people see this thread.

How much more do you need now?

AND - maybe the rescue you thought was cruel SHOULD be given your sister's email address, as well as the pet 'history' she has, especially with refusing to help Fatty get vet help.

How much more do you need now? Keep us posted on that.