Help ! chicken egg laying

HI,THS S NAVEED FROM CHENNAI,TN… WELL IAM A S/W ENGINEER… AM PASSINATE ABOUT HAVING PETS.I HAVE FEW CHICKENS THAT WERE LAYING EGGS NORMALLY UNTIL FEW MONTHS BAC… THE THICKNESS OF EGG SHELL GONE BAD. NOW THEY ARE LAYING SHELL LESS EGGS… IAM SURE THIS S A CALCIUM DEFICIENCY COZ THEY ARE NOT FREE RANGE … HERE THE POULTRY FEED IS NOT AVAILABLE. I WANT OYSTER SHELLS TO INCREASE THEIR CALCIUM IN THEIR DIET. BUT UNFORTUNATELY,I CANT GET HERE… ANYONE WHO READ THIS N WANT HELP CAN COMMENT… CAN ANYONE SHIP OYSTER SHELLS IF THEY ARE AVAILABLE IN THEIR REGION.

Sorry for the late reply!

You can get Oyster Shells or some variant of it with a company called Astrra Chemicals. They are located on greams road Chennai and export this stuff. Not sure if they will sell you retail bags, but you can always try!

Thier website is  astrrachemicals.in

Hope this helps!

I would also like to come and see your chickens as I am interested in getting my own eggs organically. is that possible?