First time candling coturnix eggs at day 7. What’s normal to see at this point — veins, movement, size of the air cell — versus what tells me an egg is a clear or a quitter I should pull?
Great time to candle — day 7 is right when things get easy to read on Coturnix eggs. Here’s what you’re looking for:
Fertile and developing:
- A dark spot with a spiderweb-like network of veins branching out (looks like a little sunburst) — that’s your embryo and its blood supply.
- You may catch a flicker of movement if you watch a few seconds; not always visible yet at day 7 but common.
- Air cell should be modest — noticeably bigger than day 1, sitting at the fat end, slightly tilted or level, not huge.
Signs of a clear or quitter:
- Clear/yellowish glow all the way through with no visible veins = infertile (clear).
- A dark ring or blob with no defined veins, or veins that look like they’ve stopped/frayed at the edges = early quitter (blood ring).
- Any egg that smells off or looks watery/discolored through the shell should come out right away — it can crack and contaminate the others.
One tip: don’t candle for too long per egg (10–15 seconds tops) so you’re not overheating them outside the incubator. If you’re unsure on a borderline one, it’s usually safer to leave it in and recheck at day 10-11 when things are much more obvious — clears and quitters get very easy to spot by mid-incubation.
If you’re tracking multiple eggs and want a simple way to log candling notes per egg for this hatch, the Quail Keeper Max app has a hatch tracker that’s handy for that. But mostly — trust your eyes, and post a pic here if you want a second opinion, folks around here are quick to help!