The doctor totally reassured me about DD's eating - or lack thereof - she said that if I lived in Africa or India she would only have milk until she was over one year old and that I should just offer food at every mealtime, as I have been, but if she doesn't want it that's fine and the same goes for drinking water. She said that even though only a baby DD knows what she needs in her body.
DD is extremely constipated and the doctor expects it to take three months to "clear the backlog" so she'll probably take that long to get back to normal with eating I guess.
I've got to get her weighed by HV and then take her back to the doctor in six weeks for a review.