I believe I have a couple of chickens with wry neck, I have read to give them Poly vi sol without iron, Where do I get this stuff? I have checked grociers stores, walmart etc. The only thing I found there was Electrolytes. I can't find Poly Vi sol. I want to get some today to start my chickens on it. Please help.. Does anyone know if CVS or Walgreens might carry it? Or do I need to go to a Tractor supply??