S.B.
I would definitely look at the website for the Hallelujah Diet, hacres.com and order him some Barley Max, that alone would be extremely nutrient dense and also healing. Vegetable juices would also be nutritious and healing, and they suggest blended salads, take the salad fixings and put 'em in the blender! voila -- fresh raw food in a form he can take in.
(healed of malignant melanoma cancer 11 years now -12 in July and on the H Diet mostly.)