I now know what she died from; she had cancer in stomach...
Before she died her stool was fluid and she was vomiting, don´t know how long but maybe a week or two. The vet said they could not help her, they did open her stomach and look, but said nothing can be done to rescue her... :-(
Oh, very sad to hear about Iina. She is granmother of Tinka. I have met Iina once in Finland when she was showing here. Then I took care of her and she was the first thai ridgeback which I met.