He needs to go on a all fruit diet to get his kidneys working again. As for the smell that is Mucoid plaque. It's a bacteria overgrowth in the small or large intestine.
Pulsium husk has to be fine ground have hI'm take one table spoon every time before bed.
He will get best results if he goes on a fruit juice fast.and take the PH. look up dr robert morse on youtube he has like over 1000 videos just look up dr robert morse and kidney health.