Clean, properly handled hatching eggs are an important part of achieving good hatchability. However, one common question among poultry farmers is: Should dirty hatching eggs be washed before placing them in an incubator?
In general, washing hatching eggs is not recommended. The eggshell has a natural protective layer called the cuticle, which helps prevent bacteria and other microorganisms from entering through the microscopic pores in the shell.
Why Should Hatching Eggs Not Be Washed?
When an egg is washed incorrectly, particularly with water that is colder than the egg, the pressure difference can encourage contaminated water and bacteria to move through the shell pores.
Washing can also remove or damage the egg's natural protective coating. This may increase the possibility of bacterial contamination during storage and incubation.
For this reason, prevention is better than trying to clean heavily contaminated eggs later.
How Can You Keep Hatching Eggs Clean?
Good hatchery management should begin before the eggs reach the incubator:
- Keep nesting areas clean and dry.
- Collect hatching eggs frequently.
- Avoid allowing eggs to remain in dirty litter.
- Handle eggs carefully to prevent cracks and shell damage.
- Store eggs in clean conditions.
- Keep hatching eggs separate from heavily contaminated eggs.
What If an Egg Is Very Dirty?
If an egg is heavily soiled with manure or other contamination, it is generally better to avoid using it for hatching whenever possible rather than washing it and placing it with clean eggs.
If contaminated eggs must be incubated, they should be handled separately to reduce the possibility of contaminating clean eggs and other equipment.
The Key to Better Hatchability
The best approach is not to depend on egg washing. Clean nesting facilities, frequent egg collection, proper storage, good sanitation and careful egg handling are the foundations of successful incubation.
For commercial hatcheries, maintaining clean eggs from collection through setting can significantly improve overall hatchery hygiene and help support consistent hatching results.