We stopped in tractor supply over the weekend. They didn't have any purina at all. I asked when they might have it, and two of the employees ( one was a manager) we spoke to acted like this was all new.
Out of curiosity, I checked TSC online. It indeed says they are supposed to have it. However, they are 5 dollars more than the normal feed store I go to.
This afternoon I stopped @ TSC and purchased 2 bags of Purina Flock Raiser. If you have a subscription to the Poultry Press, http://www.poultrypress.com/, there is a $5 off coupon for Purina poultry feeds when you purchase 2 bags.