All of mine smelled like corn. Sounds like you had a bad batch.
No, not one bad batch, they
all smelled that way, including Flock Raiser. I cannot stand that toxic waste smell of Purina. I've gotten more than one bag of Home Grown for a group of older chicks because I could get it in non-medicated and it
used to have animal protein (now, they've removed it, it seems), even if it was $3 more per bag than my normal Tucker Milling. It was disgusting.
I've had several bags of Flock Raiser, both pelleted and crumble, because I could get it non-medicated and they had a big sale recently, for $5 off per bag, otherwise I wouldn't have bought it at all. They all smelled terrible!
I never have that issue with Tucker Milling and it has porcine animal protein in it, plus it's much cheaper and not dusty.
Southern States also smells fine, but I refuse to buy it from the local store because they are like a "chicken mill", selling birds crammed into small cages and their bags of feed always contain weevils, plus, again, it's more expensive than my regular brand as well as being vegetarian (except the Rockin'Rooster Booster pellets, which have animal protein)
Being in the deep south, we don't have Kent or Blue Seal or Agway or other brands mentioned.
My first flock was raised on Purina SunFresh before I learned more about animal protein vs vegetarian feeds, but they also free ranged and were fed scrambled eggs as a supplement.