While many people find that forumula correct, I healed from the rad and chemo much more quickly and at one month, while still bandaged for rad burns, was out running with my dogs. I never used more than three cans of food a day in my PEG and didn't eat until my mouth healed later than that, but I was up and out and about. It is not necessarily down time. And I was 55 at the time, so no spring chicken.

Bottom line, every single patient is different, but you and he are most probably not looking at 7 months.