What's your protein level? I was disappointed in my hens so I switched to Agway Egg Producer pellets. 21% , and they picked up. Silkies are not prolific layers are they? I've read most folks keep them for broody moms. I'd certainly consider it if I had a place for three.
Of course you do know they'd know I don't like Silkies and wouldn't go broody for me. Even if I wore my tin foil hat they'd find out some how what I think of them.
Anyhow, make a check list of what could be the problem and go from there.
They'd all been on feather fixer all winter since I have various birds who decided to molt thru winter and still are now. I believe the protein in that is 18%. This Calf-Manna contains 25% protein though. I think the problem with most my silkies is that they're getting older. My friend on the other hand has a bunch of younger ones and is getting 5-6 eggs a day from them. I'm glad I hatched silkies first last year in December and have at least 3-4 pullets growing out. Hopefully I'll get eggs from them by this summer/fall and can begin hatching from them. If they do give me eggs then the adults may get sold. My frizzled sizzle on the other hand is giving me eggs almost every day, she lays two days I in a row, skips a day, lays another 2 days, skips a day. I have a bator full of her eggs and some that are due to hatch any day. Actually my very sizzle from my own lines hatched yesterday. A cute little blue. Hopefully its a sizzle because I need more. There is a chance it could be a silkie.