Really through there whole life, best to give layena when they start to lay for added calcium and other benefits.
o and if you have it on hand it is not bad for them to get medicated chick starter as ducklings.
Ditto on the flockraiser, you can also get purinas layena for laying ducks and geese, go to there website and look up there nutritional info and graphs to show you what to feed. all from TSC
