My 86 year old father is currently undergoing radiation therapy for cancer in his throat. He's about 2/3 of the way done and his taste buds are destroyed. As a result, he has no motivation to eat or drink (and I'm pretty sure the radiation kills his appetite as well). Because his throat hurts, he can only swallow liquids, and so has been drinking (Drinking is not the right word--occasionally sipping when begged by my mother is more like it.) a meal replacement liquid called Boost (about 350 calories per can). He has lost over 20 pounds in 4 weeks and my mother is really scared that he will get sick if he continues to lose weight. Does anyone have any experience with this? Is there some way to increase the calorie count of the meal replacement drink without changing the texture so much that he can't swallow it? (I thought of ice cream and protein powder--but both will make it a lot thicker.) Thanks for your help, pickle friends.