If your chickens are laying lash eggs then they have an infection in the oviduct and you need antibiotics. It would be very odd for more than one chicken to have an infection of the oviduct at any particular time ie 2 or 3 all laying lash eggs at the same time, would be most peculiar.
I'm not familiar with Triple C.... what is it?... I would guess maybe an antibiotic?? And how old are the birds you are treating?
Crushed oyster shell is the normal means of calcium supplementation in chickens, but you can also feed them dried crushed egg shells not quite as good or a half a Tums tablet crushed and crumbled onto some scrambled egg or yoghurt for a quick boost of calcium.
Some people confuse lash eggs and rubber eggs.... the latter phrase is usually used to describe shell less eggs which are otherwise healthy and normal but have no outer protection, whereas those lash "Eggs" are more like solidified puss and are infected tissue..
