I had a tragedy, all of my chickens were killed over a month ago except for 1 RIR, she had been laying for about a month prir to this. I got 3 more hens for here a week later and they hang out like best friends, np at all. Well, Rust has not layed but one egg a week after the loss, nothing more for a month. she is adjusted now to her new flock and is not under stress. how long do they cease laying after a major trauma?