It’s best to given the fresh feed each day and only put out about the amount of feed that they will eat.
Why wouldn’t you want to fill their feeders with several days of feed?
For several reasons: First, feed will stay fresher in a feed storage bin than in the feeders where it will get more exposure to air and moisture. Fresh feed is more palatable to the chickens and more nutritious for them. Second, putting out excess feed tends to attract rodents, particularly at night.