One can only hope the chickens feel equally rejuvinated should you decide to feed them some unpasteurized milk in their diet, though I would caution against feeding them a diet soley comprised of such milk.True and yes, a bit of an exaggeration.
We have goats here, but also belong to a herd share where we get weekly allotments of raw milk from a local farmer.
The reason for folks getting sick is from the harvesting and/or handling. Hairs, blood, etc. Most herd share farms encourage you to visit the operation to see first hand how they milk the cows and bottle it for you.
recently my wife and I did a 2 week "detox" where all we consumed was the milk, and water. It was an incredible experience, and what was totally cool is that there was absolute no feelings of hunger the entire time. The "cravings" became pretty extreme, but overall it was an awesome experience. Look forward to doing it again.