Are duck eggs harder to incubate than chicken eggs?

Generally yes. Duck eggs take longer (about 28 days vs 21), lock down on day 25 instead of day 18, want higher hatch humidity (65–80% vs 65–75%), and need daily cooling and misting from about day 10 that chicken eggs don't. The thicker, oily shell also candles less clearly. The temperature is the same, so an experienced chicken hatcher can move to ducks — it's just more steps.

Can I incubate duck and chicken eggs together?

You can share one incubator since both run at 99.5–100°F, but the schedules diverge: chickens lock down on day 18 and hatch on day 21, while ducks lock down on day 25 and hatch around day 28, and ducks want higher humidity plus daily cooling and misting. Staggering sets so the lockdowns don't collide, or using a separate hatcher, avoids fighting over one humidity setting.

Do chicken eggs need cooling and misting like duck eggs?

No. Cooling and misting is a waterfowl technique for the large, oil-coated duck shell, which resists moisture loss. Chicken eggs lose moisture readily on their own, so you just turn them and hold humidity around 45–55% until lockdown.

What humidity do duck eggs need compared to chicken eggs?

Ducks run about 55–60% during incubation and 65–80% at hatch; chickens run 45–55% during incubation and 65–75% at hatch. Ducks are set a little higher throughout because the oily, low-porosity duck shell holds moisture. With either species, track the air cell and adjust to it rather than chasing a fixed number.

Why do duck eggs take longer to hatch than chicken eggs?

It's simply the species' development time. Domestic ducks descend from the mallard and take about 28 days (Pekin/Rouen ~28, Mallard ~26.5–27, Runner ~28.5), while chickens develop in 21 days. That's also why duck lockdown is day 25 versus day 18 for chickens.

Is lockdown different for duck eggs and chicken eggs?

The idea is the same — stop turning, raise humidity, and keep the incubator closed — but the timing differs. Chicken lockdown is day 18 (hatch day 21); duck lockdown is day 25 (hatch ~day 28). For ducks you also stop the daily cooling and misting at lockdown and open the vent a little more for the extra oxygen a hatching duckling needs.

Duck vs Chicken Eggs: Incubation Compared

Verified September 2026

The short version

Duck eggs hatch in about 28 days with lockdown on day 25, and — because the large, oil-coated shell resists moisture loss — they need higher hatch humidity (65–80%) plus daily cooling and misting from about day 10 to shed enough water. Chicken eggs hatch in 21 days with lockdown on day 18, run 65–75% humidity at hatch, and need no misting or cooling. Both incubate at the same 99.5–100°F forced-air temperature; the real differences are the timeline, the higher duck hatch humidity, and the cooling-and-misting routine unique to waterfowl.

Attribute	Duck eggs	Chicken eggs
Total days to hatch	~28 days (Pekin/Rouen; Mallard ~26.5–27, Runner ~28.5)	21 days
Lockdown day	Day 25 (stop turning, cooling & misting)	Day 18 (stop turning)
Forced-air temperature	99.5–100°F (hatcher eased to ~99°F)	99.5–100°F
Incubation humidity	55–60%	45–55%
Hatch (lockdown) humidity	65–80%	65–75%
Cooling & misting	Yes — daily from ~day 10 until lockdown	No
Egg size & shell	Larger, oil-coated, low-porosity — holds moisture	Smaller, more porous — loses moisture readily
Candling difficulty	Harder — thicker, often tinted/greasy shell	Easier — thinner shell, clearer veining

The verdict

If you're new to incubation, **chicken eggs** are the more forgiving place to start: a shorter 21-day run, no cooling-or-misting routine, and a thinner shell that candles clearly. Choose (or plan carefully for) **duck eggs** when you specifically want ducks — they hatch in about 28 days, lock down on day 25, want higher hatch humidity, and need daily cooling and misting from about day 10 to lose the right amount of moisture. The temperature is the same for both, so the same incubator works; what changes is the timeline, the humidity target, and the extra moisture-management step. Whichever you set, drive it off the air cell, not a fixed humidity number.

Cooling and misting: the waterfowl difference

The single biggest difference between hatching duck and chicken eggs is cooling and misting. Chicken eggs need neither — you turn them and hold humidity, and that's it. Duck eggs are large and coated in a natural oil that slows moisture loss, so from about day 10 waterfowl hatchers open the incubator daily until the shell surface cools to about 86°F, mist the eggs with room-temperature water, then close up (Metzer Farms). This briefly opens the shell membrane so the egg sheds moisture, targeting roughly a 13% loss of egg weight by day 25.

Skipping this step is the classic duck-hatching mistake: without cooling and misting the greasy, low-porosity duck shell can retain too much water and drown the duckling. Both cooling and misting stop at lockdown on day 25 — from there the egg is left alone.

Humidity and the longer timeline

Duck eggs run a little wetter than chickens. Incubation humidity is about 55–60% for ducks versus 45–55% for chickens, and at hatch ducks want 65–80% versus 65–75% for chickens — higher because the oily duck shell resists moisture loss (Cornell Duck Research Laboratory; Mississippi State Extension). Counter-intuitively, that higher humidity is why the cooling-and-misting routine matters: humidity alone can leave too much water in the egg, so ducks get both a higher number and a daily moisture-shedding step.

The timeline is longer, too. Chicken eggs hatch in a tidy 21 days with lockdown on day 18. Most domestic duck breeds descend from the mallard and hatch in about 28 days — Pekin and Rouen around 28, Mallards a touch sooner (~26.5–27 days), and Runners a touch later (~28.5 days) per Metzer Farms — with lockdown on day 25. Candle both around day 7 to confirm veining, though the duck's thicker, often tinted shell makes candling harder to read.

What stays the same

For all their differences, ducks and chickens share the fundamentals. Both incubate at 99.5–100°F in a forced-air incubator (Mississippi State Extension specifies 100°F; other extension sources cite 99.5°F), both need turning at least several times a day through lockdown, and both are best judged by the air cell rather than a humidity readout. The same incubator hatches both — you simply reprogram the schedule, raise the humidity and add the cooling-and-misting routine for ducks, and lock down a week later.

Frequently asked questions

Are duck eggs harder to incubate than chicken eggs?: Generally yes. Duck eggs take longer (about 28 days vs 21), lock down on day 25 instead of day 18, want higher hatch humidity (65–80% vs 65–75%), and need daily cooling and misting from about day 10 that chicken eggs don't. The thicker, oily shell also candles less clearly. The temperature is the same, so an experienced chicken hatcher can move to ducks — it's just more steps.
Can I incubate duck and chicken eggs together?: You can share one incubator since both run at 99.5–100°F, but the schedules diverge: chickens lock down on day 18 and hatch on day 21, while ducks lock down on day 25 and hatch around day 28, and ducks want higher humidity plus daily cooling and misting. Staggering sets so the lockdowns don't collide, or using a separate hatcher, avoids fighting over one humidity setting.
Do chicken eggs need cooling and misting like duck eggs?: No. Cooling and misting is a waterfowl technique for the large, oil-coated duck shell, which resists moisture loss. Chicken eggs lose moisture readily on their own, so you just turn them and hold humidity around 45–55% until lockdown.
What humidity do duck eggs need compared to chicken eggs?: Ducks run about 55–60% during incubation and 65–80% at hatch; chickens run 45–55% during incubation and 65–75% at hatch. Ducks are set a little higher throughout because the oily, low-porosity duck shell holds moisture. With either species, track the air cell and adjust to it rather than chasing a fixed number.
Why do duck eggs take longer to hatch than chicken eggs?: It's simply the species' development time. Domestic ducks descend from the mallard and take about 28 days (Pekin/Rouen ~28, Mallard ~26.5–27, Runner ~28.5), while chickens develop in 21 days. That's also why duck lockdown is day 25 versus day 18 for chickens.
Is lockdown different for duck eggs and chicken eggs?: The idea is the same — stop turning, raise humidity, and keep the incubator closed — but the timing differs. Chicken lockdown is day 18 (hatch day 21); duck lockdown is day 25 (hatch ~day 28). For ducks you also stop the daily cooling and misting at lockdown and open the vent a little more for the extra oxygen a hatching duckling needs.

Sources

Hatching Duck Eggs (temperature, humidity & lockdown day 25) — Cornell University Duck Research Laboratory (University extension)
Important incubation factors (duck and chicken incubation table) — Mississippi State University Extension Service (University extension)
Incubating and Hatching Duck Eggs (cooling, misting & breed hatch times) — Metzer Farms (Hatchery)