Fed the cat

Went over to feed my sister's cat. She was not happy to see me. She hissed and growled as I pet her and then later tried to play with her. OK, whatever. The food bowl and water dish were empty so filled those. I gave her another water dish so she doesn't get dehydrated. Cleaned the litterbox and took out the garbage. I presented food and she sniffed it, but didn't eat any. No messages on the answering machine to report so went home. Everything is right were they left it.