I wouldnt, I dont remember why but poly with iron is a big no no. Maybe it has too much iron or something.I know that PolyViSol without iron is the one to buy for chickens, but I happened to think that liver is high in iron, (and thats the typical reason that liver is suggested) --so in the case of a chicken needing iron, I'm wondering if PVS with iron would be better for chickens that need more? I am not endorsing this idea because I am not a vet! Just wondering, that's all.