Mainly refers to pale eggshell color, dull and non-vibrant eggshell color, lack of luster, many soft-shelled eggs, thin eggshells, easily broken, sandy-shelled eggs. Thick but brittle eggshells, fragile quality, many damaged eggs.
Nutritional Factors
- Insufficient calcium intake.
- Insufficient vitamin D3 intake.
- Unreasonable nutritional ratio, high protein, large eggs.
- Low antibody levels (insufficient or high dispersion in Newcastle disease or influenza antibodies).
- Influence of mycotoxins.
Management Factors
- Long intervals between egg collection.
- Improper medication.
- Flock startled.
- In large-scale farms, egg collection equipment failure, excessive gap at the junction of egg collection belt and egg belt recovery.
Disease Factors
Certain diseases affect eggshell quality, such as viral diseases like Newcastle disease and infectious bronchitis, egg drop syndrome, salmonellosis, E. coli disease, etc., making eggshells pale, uneven thickness, lighter color.
