What is “egg candling”?
Egg candling is like ultrasound we check the egg is fertile or infertile. That was helpful for farmer to check the quality of fertility, and before the incubation calculate the Production.
Purpose of egg candling?
The main purpose of egg candling is Monitor the development inside the egg. Furthermore, identify the problem of embroy in early stage and calculate the production before hatching, if you use incubator so these problem indicate to fix the incubator issues.
How to do egg candling?
The easy method to check the fertile egg is candling is with the help of mobile backlight or any other torch.

Method of egg candling step by step
- Off the Room light.
- On the mobile torch.
- Rotate the torch side the egg and see the vessels.
Evaluation of Chicken egg embroy.
- Day 1 egg.
- Day 2 Blood vessels grow.
- Day 3 Heart is develop.
- Day 4 Embryo take on chick like shape.
- Day 7 Feather beak or wing development.
- Day 10 Skeletal growth.
- Day 14 Hardening of chick beak or and claws.
- Day 21 Piping Start.
- Day 21 Chick hatched from the egg.
Here is the video to filming all the the process of egg candling day 1 to day 21
https://youtu.be/omPVSxi3Jfk?si=kGrXxfl1ifHKOvUR
How we deterine fertile or infertile eggs with the help of candling?
- Fertile egg: Moving dark spot inside the egg with vessels is the sign of fertile egg.
- Infertile egg: Infertile egg is fully yellow and no veins inside.
- Dead in Shell: Embroy was not moving in dead in shell or big large blood circle around the embroy.
- Air cell: The air cell is normal during cndling but the large air cell is the sign of problem insight the embroy during candling.
Here is the video to determine the fertile or infertile egg with the help of candling
https://youtu.be/ZqFvO9jg1HI?si=3wT8Tr_rkBfkyzXn
How to get higher fertilty in poultry farming?
- Provide balanced diet provide higher protien around about 18% to 20%.
- In summer manage the Heat stress to better fertility results in poultry farming.
- Provide minerals and vitamin paly vital role to boost fertility in poultry farming.
- Maintain the coop temperature (18 to 26 degree) is better result to enhance the fertility performace in poultry farming.
- Lighting also play important role in egg production and increase fertility in poultry farming. Provide 16 hours lighting in breeding season in poultry farming for better egg production or fertility.
Dead-in shell reason in poultry farming:
- Genitics abnormalities is most common reason dead-in shell in incubation period.
- Chick doesn’t position itself correctly in the egg.
- When incubation temperature is too high or low can cause dead-in shell in incuation.
- Humidty level can also cause dead-inshell. Low humidity level can dehydrate the chick, or high humidity level can drown it.
- Bacterial or viral infection like most of the case mycoplasma can cause dead-in shell in incubation.

Precaution during egg candling
- Wash you hands before egg candling.
- Warm up your hands.
- Handle egg carefully while candling.
- Quicker examine the egg and return in the incubator.
- Mark the egg while candling they helpfull to avoid confusion..
- Best days for egg candling is day7 10 day10 or day14 to day17.
- Avoid the candling day18 to day21.
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Thanks to read our information our mission to aware farmer about new technology in poultry farming and also provide infornation about oriented chicken breeds or bloodlines.

My name is Abdullah. In my childhood, I loved raising chickens in my backyard, especially Asil chickens. I have a lot of knowledge about poultry and Asil farming. In 2022, I decided to create a YouTube channel named Aseel ClubYoutube to provide information.and 2023 create facebook pageFacebook to aware the poultry farmer In 2024, I created a website to share my knowledge and experience with the world