We have 2 silkies - the white one started laying this week at 28 weeks old (about 6 1/2 months) She'd been squatting for us for a couple weeks before that. The buff colored one hasn't squatted and isn't laying yet.
The way I understood the layer food question, is that you shouldn't start feeding the layer feed until they are actually laying eggs. The extra calcium is what they need for the egg shells - feeding it early isnt' going to make them sexually mature faster - it's unrelated - and the extra calcium before they need it can harm their kidneys?.. Something like that...
But I'm still new at this, so perhaps someone else can let me know if i misunderstood.