Make sure you buy raw un-pasteurized apple cider vinegar with the mother, which is the sediment at the bottom of the bottle. It is cheap you can buy it at Whole Foods or a natural food store.
http://www.bragg.com/products/applecidervinegar.html
I agree with Wes the bread and chicken scratch doesnt sound very nutritious. My wife will feed our chickens steamed rice from the rice cooker with some DE added to it she says this keeps the chickens from having to much fat. She will get mad at me if I feed them scratch saying too much fat, we...