Hey gang, my girls are now approaching 6 months in age and will probably start laying soon with spring just around the corner. Should I go ahead and start them on layer feed, or should I wait until they actually start laying? I also have oyster shell, when should I start giving that to them as well? Right now they are still on DuMor (sp?) game bird grower crumbles with a little added cracked corn for some winter insulation. Plus lots of peas and meal worms and lettuce and cucumbers of course. And while I'm asking, what layer feed do you recommend? Is there such a thing as duck layer feed or should I just use chicken? I shop at TSC and all I have seen is chicken layer. Thanks for the help!