Why did my maran stop laying?

[MULUChicks]

We are new chicken owners and have two Americana's and one Maran. We got them as chicks several months ago and all have been laying daily for approximately two months. But the Maran hasn't laid for at least two weeks now. She is not moulting, doesn't appear sick or stressed in any way, and we're in Florida in the peak of Summer so I know it isn't lack of daylight. They get layer feed, oyster shells, and mealworms. I did notice mites in the past week but used DE and an oil/water/soap mixture that got rid of them pretty quickly. She doesn't seem to be itchy and her comb is still bright. She also does not seem broody. So I've run through the "not laying" checklist. Anything I'm missing?

 

[rosemarythyme]

Has it been pretty hot lately? Heat can cause them to get off laying as well.

 

[aart]

Heat could be part of it....they don't eat as much, they drink a lot but it goes right thru them to shed heat from body.
Marans are not stellar layers to begin with.
Do you free range? She might be laying out in range area.
Might check for mites again, DE and soap is not a long term cure for an infestation, did you treat the coop too?