Difference in comb size between hens of same breed?

[catfish/okie]

If any of them eggs are white they may be coming from that bottom bird.

 

[Chris09]

Well I think that there Hens..
Neither of the two have long Main Sickles in the tail or long saddle feather.

Just because it has a large comb doesn't make it a rooster. Leghorns are know for large combs the hen comb will at times flop to one side.

Chris

 

[Cuban Longtails]

Those are both pullets. I've owned white leghorns, some mature sexually earlier than others. It's normal, and they grow huge combs like the one in the photo that RoPo posted the closer they are to egg laying.

 

[k2chickens]

hope you all find the sex of the birds

 

[Dustin Biery]

I agree with RoPo. They are both females. Chickens are not any different than any other species on the planet...some mature faster than others. Just because they were hatchmates doesn't mean they will mature as fast. Take for instance you hatch 2 cockerels. One may crow at 8 wks and the other doesn't until 4 months. Does that mean that just because it isn't crowing is a female. No, it just means that the two birds matured at different rates. Use common sense.

Going on an assumption...the OP said they came from a hatchery. These two birds could be from different lines. One line obviously matures faster than the other.

ETA: Maybe some research would help you in this scenario.

 

[ChickenCharmer]

Both females

 

[Brick243]

Both pullets!

 

[ArizonaDesertChicks]

This is one of my leghorn pullets at 19 weeks of age (before she started laying):

Here she is again at about 23 weeks (right about the time she started laying):

Yours is a pullet too.

 

[Rosecomb-Ryan]

Yeah they are both pullets.

 

[FrizzleFreak]

To everybody who said that these birds were roos:
Leghorns are a Mediterranean breed. This means, among other things, that they have large combs to help distribute heat.
(yes, I know that leghorns have rosecomb varieties, but those were bred in much later)
Their secondary sex feathers are very well defined.
A lopped comb is usually a sign of a hen, especially one in laying condition.
Mediterranean breeds often are very high strung, and have white earlobes and thus lay white eggs. They are all clean legged.
In a nutshell, don't be childish. Just because it has a large comb, doesn't mean it's a roo.