So my girls are now 5 months old and still no eggs yet? they free range every day plus have food in the coop and oyster shells. there are no hidden nests around the yard i check daily right now. 2 out of my 4 older girls combs have gotten very large and red. I try and keep the coop very clean right now so they wont refuse it. my 2 youngest ones do sleep in the nest boxes every night, snuggled together. and i have put fake wooden eggs in there to kinda get them thinking about laying eggs. im just wondering if there is something else i could try? a friend of mine who i gave 2 of my chickens to are already laying but the sisters of them that i have are not? and how do i discourage the two youngest from sleeping in the boxes at night? all i can think of is to block off the boxes but then im afraid it will put off the older girls from laying. the night have been dropping to the mid 50's should i turn on the heat lamp will that help them want to lay?