Candling is simply shining a light source through an egg to see what you can see inside the egg. Look it up on the web.
the yolk
Eggs
You can candle them to check for development. Mark those with dark spots indicating they are viable and date them. If after 21 days there is no change they are garbage. If you candle and see nothing, then they were not fertile eggs and should be discarded.
You can try candling quail eggs at about eight days. Though it is often hard to see due to the coloration of the shell.
Light ,bright,and shiny is what I think of.
To determine if your cockatiel has laid fertile eggs, you can either candle the eggs after a few days of incubation to see if there are developing embryos inside, or consult a veterinarian for a professional evaluation.
Yes, cockatiel eggs can be fertile. To determine if they are viable for hatching, you can candle the eggs by shining a light through them to see if there is a developing embryo inside. This can usually be done after about a week of incubation.
The best way to tell if eggs are gluggers is to candle them. Hold a flashlight behind them in a dark room. You should be able to see the veins or developing embryo if they are fertile.
Most likely there was a temperature or moisture problem. It is possible that the rooster has aged out and is "firing blanks" when he mates. You will need to "candle" the eggs to see if there is any growth going on inside the shell.
Candling can be done at any time, although day 8 onwards is usually when the embryo is more easily identified. Day 3 of incubation (usually pale shelled eggs). Day 5/6 of incubation (usually dark shelled eggs). Between day 8 - 12 of incubation (embryo more easily identified). 3 days prior to hatching.
you candle eggs to tell if the animal is alive and to see how the animal is living, is it growing well etc,.
A candle