I use ACV in my mix of FF it only takes about 48 hours to get a good ferment going. I feed about 6 lbs a day to a mixed age flock of about 40. They will darn near knock me down to get to it too. I also mix in a little DE and Nutri-Drench everybody is healthy and we are getting great eggs. This week I plan on adding some alfalfa to my mix. I will pass what I find on. Happy Sunday.