Back on July 2nd or so, we purchased 5 new chickens, all right at 5 months. Two had started laying. Both laid for a couple days, but the stress of changing homes and being introduced to new birds stopped that. Only one has begun laying again (as of 3 days ago). The other hasn't laid again yet, and only 1 of the other 3 began laying. The stress they feel from being moved into a new home, with new birds can certainly cause egg laying to stop for an extended period of time...I've read people say months in some circumstances.