As others have said, "Start of Lay" is breed dependent, with huge individual variations. I usually offer a 4 week range for "typical", no guarantees. Its like a strong suggestion.
Silkies, btw, are not famed as either early or frequent layers. Neither do they produce large eggs. They are "vanity" chickens when viewed from the standpoint of practicality. Essentially the same with the Polish, worse in some ways. The Sussex, at least, has some productive value, though I'd be surprised if its start of lay isn't between 24 and 28 weeks - or if it lays more frequently than every other day.
If Eggs were your primary concern, none of those birds were good breed choices. Better luck, and more pre-purchase research, next time.
Silkies, btw, are not famed as either early or frequent layers. Neither do they produce large eggs. They are "vanity" chickens when viewed from the standpoint of practicality. Essentially the same with the Polish, worse in some ways. The Sussex, at least, has some productive value, though I'd be surprised if its start of lay isn't between 24 and 28 weeks - or if it lays more frequently than every other day.
If Eggs were your primary concern, none of those birds were good breed choices. Better luck, and more pre-purchase research, next time.