Egg INSIDE Membrane?

[JulieCapoolie]

So, I have a two year-old Pekin, who laid an egg this morning and it was inside of a membrane. She is currently having issues with one of her legs, this has been ongoing for several months. The vet after several visits could not figure out why she’s having this issue, except may be neurological due to ingesting a lot of pebbles, I have her on Manna pro layer diet with oyster shell available, and also giving her Tums daily.
Posting a few pics if anyone has any idea why this happened??

 

[Canadian Wind]

Extra calcium would probably be good to help with eggs like that, but the leg issue is most probably a niacin deficiency, which is very common in Pekin and affects their legs first.

You can get Durvet vitamin B Complex at TSC, it labeled for bovine injection but can be given orally over a treat.

Check out this thread for more info:

https://www.backyardchickens.com/threads/niacin-deficiency-in-waterfowl.1367557/

 

[Miss Lydia]

What did this egg look like inside did you open it up? Just wondering if it's a lash egg.