Just do what we did. Left on vacation on Sunday and Monday the chickensitter called to tell us the first egg had been layed. We kned it would happen. Had an egg pool going at work and I originally picked the 19th, then changed it to the 23rd. Should have relied on my instincts since the first egg came July 19th. We are thinking it came from Mrs. Poon, our RIR. Nothing the next day, one on Wednesday and 2 today. So now 2 out of our 4 girls are laying. The weird thing is, the very 1st egg was much bigger than the next 3, so we are still trying to figure out if it came from the chickens or a joke played on us by a neighbor. Either way, at least they are finally laying!!!