Do ducks eat own eggs?

Yes, ducks can and sometimes do eat their own eggs. While not ideal, there are several reasons why this might occur.

Reasons Why Ducks Eat Their Eggs:

Calcium Deficiency: Laying eggs requires a significant amount of calcium. If ducks aren't getting enough calcium in their diet, they may eat eggshells (or the entire egg) to replenish their calcium levels. The provided YouTube video confirms that ducks can eat eggshells and that it is healthy because of the calcium.
Accidental Breakage: If an egg accidentally breaks in the nesting area, ducks may eat it rather than leave it to rot and attract predators.
Learned Behavior: Once a duck discovers the taste of eggs, it may continue to eat them. This can be a difficult habit to break.
Stress or Boredom: Stress or a lack of enrichment can sometimes lead to abnormal behaviors like egg-eating.
Overcrowding: Overcrowding in the coop can increase stress levels and the likelihood of egg eating.

Provide a Calcium-Rich Diet: Ensure your ducks have access to a diet that meets their calcium needs. Oyster shells are an excellent source of supplemental calcium.
Collect Eggs Frequently: Collect eggs multiple times a day to minimize the chance of them being broken or eaten.
Provide a Comfortable Nesting Area: Offer plenty of clean, dry nesting material in a quiet and secluded area.
Reduce Stress: Ensure ducks have enough space, access to clean water, and opportunities for foraging and swimming.
"Dummy Eggs": Place golf balls or ceramic eggs in the nesting boxes. The ducks may peck at them, but they won't be able to break them, potentially discouraging the behavior.