Sorry, I missed your question earlier!
I feed Flock Raiser from hatch to lay, no need to change feeds at all... don't get angel wing either... thought we had it once and did the wrap, but had a couple more look similar and left them go see and they grew out of it no problem... sometimes when their flight feathers are coming in the extra weight makes them look messed up for a bit til they get used to them...
Anyways, hatch to lay for flock raiser and we have lots of happy, healthy, shiny feathered ducks!