I give some dairy...yogurt every few days. I've given cottage cheese as well, but not on a regular basis. My dogs can handle it just fine. Some dogs may have more sensitive gut and can't handle it.
As far as vitamin supplements I give C(1000mg) and fish oil(2000mg). Vitamin e(400iu) with mixed trocopherols every few days. Feeding raw isn't as difficult as some make it out to be.
Green tripe is a daily staple, it has many nutritional benefits, probiotics and digestive enzymes. Eggs are part of the dogs diet too and contain vitamin E.
Specific supplements for individual dogs may be needed.
I used tumeric for help with inflammation management w/ my older female. There are many herbs that are beneficial for managing certain conditions.