Do you know how old in weeks?I'll have to keep an ear out for the classic egg-laying song to identify who started laying!
4 months could be 16-20 weeks.
Do you have any 'sexlink' breeds?
And if you really want to know....
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/
yaaay!! The first eggs are so exciting! Prepare yourself, you may see a couple soft shells or more tiny eggs, but within a week or two they will get the plumbing working! Also, I'm not sure if it's scientifically proven or anything...but my birds started all together, sort of like human females when their time of the month gets synced...it was really quite strange, all around the same age but 2 different breeds.
