Hi Tinkerbell
You can buy high calorie, fortified liquid supplement called Fortisip from the pharmacy (or get them on prescription ) which are aimed at people who have lost their appetite but would also make a good basis for a shake you could add things like banana to, also chopped nuts would be nutritious and high cal, a spoonful of peanut butter or full fat flavoured yoghurt? All healthy but also all relatively high in calories. Xxx