to switch to a layer feed? I ask because our 3 weekers are roughly halfway through their bag of starter, and I need to know wether to order another bag of starter, or if they can switch to layer within the next several weeks (they'd be around 6 weeks old or a little more- I'd guess -when I run out of starter feed). They are already almost completely feathered, and each weigh about a pound. Also, they'll be moving out to the coop in the next week or so, as if that makes any difference...lol Thanks! PS...I found some that is Layer/Grower feed 18%...would that work for them, or should I keep them on starter until they finish another bag?