I've never seen it either... On a physical shelf or online on TSC's website. They're all around the same price though, and same protein percentage, so I don't know if having medicated flock raiser would've made any difference for me. Either way, my formula is still "feed something medicated at first, then go to regular flock raiser".^^^ why there is no "one size fits all" solution. A good reminder for all of us. Purina does, btw, make a medicated Flock Raiser - but I've never seen it on the shelf.