More info on previous 'feeding chickens' question
The butter tub is just used as a 'scoop' to fill the feeders. The hens get Purina layer crumbles and 'Packsaddle' scratch. They have never cleaned up a 'tub' of layer food in less than a week. I have tried all the brands, same lack of interest. I put the scratch on the ground in the yard. They will pick at it for 10 minutes--then it will sit there for a few days.
It sounds as though they are getting full on nature's bounty. I presume they always have fresh water. Guess we'll have to go with the oncoming molt. My 10 hens are only managing 2-3 eggs a day and are just coming slowly out of molt. Also the light levels are falling, alas.