super thin shells?

[Aj1911]

One of my hens (a GLW or a RIR) is laying very very thin shelled eggs

so thin infact they break once they land on the pine shavings/straw in the nest boxes

they're feed consists of: oyster shell (free choice) Organic laying pellets with oyster shell mixed in and plain yogurt with some laying pellets a little 28% game bird and oyster shell mixed in

for a treat they get a little bread some rolled oats and some garden greens (mainly lettuce) oh and some fruit (spare cantaloupe, apples and what ever else i can find) they dont get alot of treats but they get some.

they also free range.

 

[Ridgerunner]

This link gives different reasons for soft shelled or thin shelled eggs. You might check it out. From your post, I'd suspect it is genetic, but it could be something else.

Soft shelled Eggs
http://www.thepoultrysite.com/publi...ndbook/16/thinshelled-eggs-and-shellless-eggs