I'm a big fan of braggs I use it for quite a bit of stuff. Is it for their digestive system. Really they eat eggs? Like scrambled or raw? What age do u give yougurt and bananas?Just some information I learned, I have only been doing this for eight months so I am no expert but want to offer anything I can think of from a newbe point of view that might help....
I am sure a lot of people here will agree ACV (apple cider vinegar) is your new best friend. I use a table spoon of Bragg's per gallon of water, two in summer. Also sugar helps calm them so when I make major changes, like moving them to the coop or on mowing days that I have to keep them locked up I dissolve a table spoon or two in there water as well. While they are young you can give them feed mixed with Greek yogurt and bananas, oatmeal and eggs, or just mash(feed and water) as a teat, I started doing this at two weeks old you might wait a little longer then I did. I used the medicated feed with mine and had no serious problems, however I am sure there are many opinions on that point. I also made sure to mix grit into there food. They will crap in the food, if you can put the food up that would be best mine always kicked the wood shavings in the food and then could not find it. For treats I found a shallow cat dish that was rectangular so each of them could get to it without blocking it from the others. I started giving mine mealworms at 3 weeks old, kind of early. That is all I can remember right now. As I said I am new as well and I am sure there is better advice out there, this is just my thoughts from my first batch.