It looks like a common problem. I have 8 red pullets about 7 months old. They started laying about 3 months ago and at one point I was getting 7 eggs a day. Then suddenly some neighbor called city animal control complaining about our chickens and city told us we couldn't keep them. So I relocated them to my friend's property in the county. The move caused a drop in production but I was still getting 3 or so eggs per day. I got them a rooster, hoping that could booster egg production. Not sure if that helps but slowing I was getting sometimes 4 per day. Then the rooster died of an accident, and egg production dropped to about 1 per day. I went to a commercial slaughter house and selected a good looking rooster for them. He is not as active as his predecessor, but still doing his duties as I got a couple fertile eggs. But a few days after getting this new rooster, all hens stopped laying. Now I get 0 egg. They are not molting, not broody. Weather here is still very warm with plenty sunshine, they eat a lot of feed every day. I noticed one or 2 hens were slightly inactive, appearing a bit sick, but all recovered after a few days.
Are there any veterinarian or expert in here that can help us? Really appreciate!