Help Needed! No Eggs For 2 months.

[Chickeeaholic]

Help needed! I have 25 hens (Barred Rocks, Buffs, Amerucanas) and 2 months ago they just quit laying. The eldest are 3 years old, but most were born last June. This time of year, I'm usually up to my neck in eggs, and since April I've had about 1 egg per week.
They free range all day and go into a secure coop at night.
I've always fed them Texas Natural Organic Layer Pellets and haven't changed their feed. I give them meal worm snacks and fruit/veggies, too.
I don't use any pesticides, herbicides or any other harmful chemicals on my property.
I've triple-checked the coop for a hidden, giant rat snake or other predator.
I've searched the property in case they were laying outside of their nests.
This started long before our heatwave, so it can't be that, either.
None are broody.
No mites.
I've had hens for 13 years and never had this happen. I'm mystified about what to do. Any ideas?

How are your hens now? Did they ever start laying again? Im reading this on other sites too and people are suspecting pellets? Not sure at all I’m just wondering if it was ever resolved?