Well after a few weeks of frantically pulling my hair out trying to get dad to eat something, and taking him to the doctors 3 times followed up with blood tests, Xray and today an ultrasound. It seems that he has a gallstone discovered by the nice lady who did the ultrasound. Of course I have googled it and apparently gallstones can cause loss of appetite and nausea. Dad's weight loss has been dramatic and although I don't wish gallstones on anyone I feel that we may have at least discovered the source to his problem. He is living on milkshakes at the moment with maybe a yoghurt a day. He had a choc ice last night and promptly threw that up along with his earlier milkshake. Has anyone else experienced this problem with an elderly person. Dad is 88 in a couple of weeks.