Congrats on the broody silkie, My Darla went broody again.... so 5 times 17 months. I had said no babies ( its almost winter) but she was determined, I also had no adult working roo ( we had to put him down due to failing health and old age) so no babies from the eggs she was sitting on. I didn't know what I was going to do, I culdnt deal with the depressing invisible babies thing again, so I was actively looking for day old chicks. luckily a few days before my mother had a hen come out from the woodwork with 7 babies, she was a show hen so mum didn't want her mothering, and on day 4 we removed her babies and gave them to my Darla who happily accepted them. they are now 6 weeks old and running a muck with the others. hopefully she can wait for spring, because there can be no more babies until then ( to cold, and wet) . It Is a lot, she is convinced that she must have all the babies.... .
that's a shame, it does sound like someone or something got them, if the eggs get removed or they get disturbed ( eg frightened by hedgehog) then they will usually up and move. good luck with the candling, I do hope you get a good hatch for your babies.