I'm really sorry to read this. It's the news no one wants to get but we all know it's coming at some point.

The best thing you can do is to give her the best care and attention you can and let her go before suffering too much.

Trying different ways to help her get better is only going to make her suffer more. Sooner or later other problems are going to appear and the inevitable is going to happen anyway. Poor Nadi.