My red sex link hen laid two eggs today. One was hard shelled but not colored evenly..the other was a soft eggs. She does this about once a week. Has anyone else had this happen? What would cause this?
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It sort of sounds like her egg production mechanism is sending out eggs faster than her shell production mechanism can make shells. Especially if she is making large eggs.
Vitamin D3 and calcium are essential for shells. You can get chicken vitamins (even at TSC or on line) and giving oyster shell, and crushing their own egg shells (I microwave mine when I am fixing a cup of boiling water) provides plenty of calcium along with a good layers ration for the feed. Putting 1TBSP of apple cider vinegar in the hen's water helps their body absorb calcium too.
if the hen doesn't have enough calcium she will pull it from her own bones (ouch).
But the rate your hen produces, it seems that it would be impossible for her to make 2 shells in one day...although some egg layers occasionally can accomplish that now and then.
It almost sounds like it would be good to slow her down a little. Good luck, post back if you get the 'cure'.