Mallard layed really weird "egg"

[nayeli]

I have heard of powdering chicken shells and adding that to their feed to give them additional calcium. Maybe that would work or help in the meantime. I know chickens will sometimes eat their own eggs if they are deficient.

 

[nayeli]

I wouldn't recommend giving them eggs, just the shells.

 

[Searsmom]

If I can find a pic I'll post it. One of my Buff ducks laid her first egg last spring - it was the yolk encased in a sac with a little grit over it and connected by a 1" long tube of the same sac material covered with grit, was the white, also encased in a sac with a little grit (I'm assuming egg shell particles). She went on to lay lovely eggs and we never saw another "weird" one anything like that again.