3-4 eggs a day to 0 ?

This site may help. I suspect an egg-eater may be the culprit. If it is an egg-eater, it is something you need to get a handle on quickly.

http://www.ext.vt.edu/pubs/poultry/factsheets/34.html

 

I feel that its normal. I have 5, 2 yr old, that some days I get 5 eggs, most days 2, 3, 4.
Simple startles can upset that balance, from another bird flying over, hawks landing in trees above, the pecking order and they do have some control over ovulation.
Today or soon they should be back up to normal. Also, some farmers claim that if you feed anything else other then layer feed, you will not get steady eggs, I prefer the pet aspect and give them treats, for health.
Good luck and I'm certain a more knowledgeable chicken tender will give you a more technical answer.
Have a great day!!!

 

Well, mine are in three different pens and I have gone at least a week with no egg!

I was inspecting the girls, and I think something has thrown them into a molt. Not a full molt, like a mini molt. Their feathers look fine on the surface, but there are new feather quills under there.

Nothing has really changed, the weather has been really up and down, but nothing has really changed in the coop.

I guess I'm going to take the opportunity to deworm and Frontline everyone.