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How can Cole duck hatch without an incubator?
1. Egg selection: Choose intact eggs with the same size and shape without cracks, preferably fresh eggs collected within 7 days after breeding ducks mate.

2. Make an incubator: you can make an incubator with wooden cases or cartons to ensure that the eggs can be completely covered and have enough ventilation.

3. Temperature control: put the eggs in the hatching nest and keep the temperature at room temperature (18-23 degrees Celsius). Either the temperature is too high or too low can be properly adjusted, but the temperature should be avoided.

4. Humidity control: keep proper humidity during hatching, and keep the eggshell surface moist. You can put wet towels or spray steam in the hatch to increase humidity.

5. Ensure ventilation: In order to ensure the sufficient supply of oxygen, it is necessary to set up appropriate ventilation holes in the hatchery, but at the same time, it is also necessary to avoid excessive ventilation causing low temperature.