Natural piglet health boost?

I have just got my spring pigs. 22 to exact. they where weaned a few days ago. I am pouring milk replacer " milk cow hasn't calved" over their feed. I also give them fresh cow "sourkruat". Any tips on things a can make available to there diet to help their health? Charcoal, apple cider vinegar?

Yes, give them charcoal. Also diatomaceous earth.

I also soak the feed with some lacto ferment cabbage or sour dough discard/ friendship bread. I'm hoping to increase gut flora with the yeasts. These pig had never been on dirt before my place. To prevent scours i put supper rich humusy dirt in as well. If I did Apple cider vinegar do I need like Bragg brand with a mother or can I use great value? I have a vinegar mother so maybe i could reactivate cheap cider vinegar?