If a chicken consumes an average of a quarter of a pound of feed per day, then a regular 50-pound bag ought to be able to sustain its consumption for two hundred days. However, this calculation method does not consider any waste or the significant damage that hungry rodents might cause if they gain access to your food sources. Advice: If you want to reduce the amount of seed that gets wasted, think about purchasing a specific chicken feeder that doesn't squander any.