Jumbo eggs

[Tebogo]

Which chicken breed or hybrid breed consistently produces extra large to jumbo eggs?

 

[Chicken_Obsesser]

I've had good experience with brown leghorns but that's just me. They always lay insanely large eggs.

 

[Tebogo]

I've had good experience with brown leghorns but that's just me. They always lay insanely large eggs.

Thanks for the reply.

 

[Livia Ammon]

My older ISA browns lay regularly and lay very large brown eggs.

 

[Tebogo]

I've read so too that ISAs lay very large eggs.

In your opinion, and perhaps whoever might read, which other breed(s) can best be bred to the ISA to consistently produce very large or jumbo eggs?

 

[Smoky joe]

I had a friend 25 jears ago. He bread biglayers. A henn lays her first egg 84 gramms. Older henns lay till 120 gramm eggs with one yolk

 

[Tebogo]

I had a friend 25 jears ago. He bread biglayers. A henn lays her first egg 84 gramms. Older henns lay till 120 gramm eggs with one yolk

What breed were they?

 

[Ecarroll]

I’ve only had two, but my golden sex link hybrids have layed nice large brown eggs.

 

[Smoky joe]

What breed were they?

It was a cross from Sulmtal with kraienkopen. He must allways cross again. Too big eggs. But allways again big eggs

 

[SourRoses]

Breeding a hybrid like ISA Browns or other layer mix is going to yield very inconsistent results.

Better to look at the anatomy of chickens that lay larger eggs and breed for the physical form.

Leghorns lay very big eggs relative to their body size. Such that I feel any large-laying project should include them (and I did in mine).
What physical attributes let them lay so large?
The part I know of is that their bones are thinner. That is carried through the whole skeleton so the pelvic aperture has less bone material, making more room for an egg to pass. Those thin bones make for thinner shanks as well, which are visible for the breeder to see. The roosters leg width matters for his daughters as well.
I'm selecting for skinny legs in my project. Also for bigger birds.

There are probably more secrets to big eggs out there, but I haven't learned of them yet... if anyone does, please share!