Thanks everyone, I really appreciate your advice and concern.

She is still somewhat active, moving around occasionally. She doesn't have very much strenght, obviously, but she still has some spark in her. She has kept down the last night's meal, which gives me hope. I am breeding my own mice, so I have good chance to try and stimulate her feeding response. Last night she showed absolutely no interest in feeder when I offered it. But I really hope she will start to eat

Dehydration/electrolyte-thing is something I have to take under consideration. We do have many electrolyte-products here available and I am a nurse so even subcutaneus injections can be an option, if it seems the best way to go.