I was a bit worried that Rice might be a tiny bit dehydrated so I got her some cat milk to try and get some extra fluid into her. She really likes it and it doesn't seem to stop her eating her food or drinking water. I'd like to give her 50ml every day since it seems like a good way to get some extra fluid and calories into her - she's 15, a bit underweight and I'm not convinced that she drinks much. Is this a good idea or a bad one?