Hi Imogen4, I'm currently in the exact same position. My father has throat cancer currently and has had it 2 times before. once last year and once when I was only 2 (turning 18 in two weeks :)). He is starting his chemo therapy tomorrow morning. But he has always been at risk of diabetes. From research we noticed the yoghurt yes is extremely calorific. The eating is hard I completely understand. Have you guys tried making lots of different kinds of pureed soup or veg? My dad had one extremely invasive operation this time last year and even now he still says the first bite is always the worse. Always here if you would just like a chat, I very much would like one too if it helps. I'll ask my mum in the morning what foods she gave dad specificically as he was recovering because she still managed to cook some stuff. Donya x