To Candle or Not to Candle. That is the Question

One of the strongest arguments against candling eggs at all is simple:

Candling often causes more problems than it solves.

Especially with shipped coturnix quail eggs, candling can create unnecessary stress, second guessing, and premature removal of eggs that may still hatch perfectly fine.

Here’s our perspective:

1. Candling Is Often Inaccurate With Quail Eggs

Coturnix eggs are small, dark, and heavily speckled. Unlike chicken eggs, they can be extremely difficult to candle accurately — even for experienced breeders.

Many healthy eggs:

• Never show clear veins

• Appear to “glow”

• Look empty until later in incubation

Yet they still hatch successfully.

Because of this, candling can lead people to wrongly label viable eggs as infertile or dead.

2. Every Time You Open the Incubator, You Disturb Conditions

Stable incubation conditions are one of the biggest keys to good hatch rates.

Repeated candling:

• Drops humidity

• Causes temperature swings

• Interrupts incubation stability

• Adds unnecessary handling and vibration

The eggs don’t benefit from being checked repeatedly — but they can be harmed by constant interference.

3. Candling Creates Panic and Doubt

One of the biggest issues breeders see is customers candling too early, seeing glowing eggs, and assuming the shipment was infertile.

That often leads to:

• Removing eggs too soon

• Blaming fertility before hatch day

• Constantly opening the incubator

• Increased stress and over management

Sometimes the best thing you can do is simply trust the process.

4. Hatch Day Is the Real Test

At the end of the day, the incubator tells the truth better than the flashlight does.

A breeder’s real measure of fertility is:

• Overall hatch percentages

• Long-term flock performance

• Consistent hatch data

Not what an egg looked like under a candler on Day 5.

5. “Leave Them Alone” Often Produces Better Results

Many experienced breeders will tell you their best hatches came when they stopped obsessing over every egg and simply maintained:

• Correct temperature

• Proper humidity

• Stable conditions

Then left the eggs alone until lockdown or hatch day.

Sometimes less intervention truly produces better results. You paid for the eggs, just let them ride!

Final Thought

Candling can be educational and fun, but it is not required for a successful hatch. In fact, for shipped quail eggs, avoiding candling altogether can sometimes prevent unnecessary stress, misdiagnosis, and accidental loss of viable eggs. I know it did for me!

A flashlight cannot always tell you what an egg will do.

The incubator can.