Very easy and gentle on the system! I have only flushed once the using the epsom/juice/oil method - passed the "green peas" and sludge. Your "nog" seemed to produce lots of sludge - no stones for me.
This may be a better route for those with delicate systems.
Like you, the raw egg yolks do not concern me at all. I think I run a higher risk eating take-out food. I am of the opinion that a LOT of so-called stomache flu is, in reality, low-grade food poisoning.