What causes ducks to lay soft-shelled eggs

   Reasons why ducks lay soft-shelled eggs:
    1. Insufficient calcium in the diet, an imbalanced calcium-to-phosphorus ratio, or a deficiency of vitamin D3.
    2. Continuous high production over a long period, so the calcium needed cannot be replenished from the feed.
    3. When the ambient temperature is too high, ducks lose their appetite and eat relatively less feed, so calcium supply falls short of demand.
    4. When ducks are startled, their nervous function and endocrine gland function are disrupted, which interferes with the calcium formation of the egg, or the egg is laid too quickly, resulting in soft-shelled or thin-shelled eggs.
    5. Stress factors caused by overcrowding in the duck house; heavy ammonia levels and poor ventilation in the duck house make the ducks uncomfortable and cause them to lay soft-shelled eggs.
    6. When infected with infectious bronchitis or duck plague, the ability to absorb calcium decreases, and in the early stage of the disease the eggshell becomes thin or the egg shape becomes abnormal.
    7. Improper medication; generally the dosage of medication should be determined according to the body weight of the duck, and when the dose is too large, thin-shelled or soft-shelled eggs are also likely to be laid.
    8. Sudden weather changes, vaccination of ducks and other stresses can also lead to thin-shelled or soft-shelled eggs.
    The above content is for reference only.