i started feeding my girls layer feed when they were 18-20 weeks old, like suggested. LOL. they have been eating that for like 7 months. sometimes their eggs looked awesome, sometimes the were not smooth, like they had a matte finish instead of the slight sheen that they should have and the color seemed to be diluted sometimes. the breeds are OEG, Black Star (sex link), EE bantam and OEG bantam. then one day i realized i forgot to buy the layer feed and had to give the girls the Flock Raiser that i was feeding the younger birds. i had some oyster shell left over so i put some in a dish inside the coop for them. let me tell you, the girls eggs seemed to be better in quantity as well as quality. so i stopped buying layer feed and kept them all on Flock Raiser with the oyster shell in the free choice dish.