I normally just feed starter/grower 20% protein or Flock Raiser 20% for 20 weeks, and then switch to 16-17% layer feed after that. I find the Dumor too dusty, and prefer Purina, Nutrena, or the brand I use now, Kalmbach, which is made here in OH, and is less expensive, but just as good of quality. When they are free ranging all day, they are balancing out that amount of protein by eating grass and bugs.