grandpa's feeders grandpas feeders automatic chicken feeder - 40 lbs no waste poultry feeder, rat proof & rodent proof treadle chicken feeder, galvanized steel with lid, feeds 6-12 chickens up to 10 days silver large is up for auction in Pet Supplies. The current bid is $1.50, 99% below the $269.95 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.