Sisters or Brother and Sister?

[Shyhootska]

I have a pair of white plum rocks which were both hatched just over 15 weeks ago. I'm wondering if the larger bird who has much more developed comb and waddle and who has curving pointed tail feathers. No prominent Spurs, only small bumps. Any feedback is greatly appreciated.

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[Shyhootska]

Here's another view of the larger plym rock.

 

[junebuggena]

It's really hard to see male feathering on a solid white bird. How long has that comb been red for?

 

[Shyhootska]

Thanks for your response, the comb has been red for half its life. The birds came from MPC as day olds and were hatched on Aug 17th. Is it possible to be the same gender with their combs and waddles looking so different? Its size is quite large compared to all of the other birds as well.

 

[junebuggena]

Any chick that develops a bright red comb before 10 weeks old is male. Sorry, but pullets don't start turning red until they are getting close to laying eggs, usually sometime after 14 weeks. Considering how long this bird's comb has been red, it's a boy.
Spurs generally don't begin to develop until after 6 months old, and it's not really a good way to tell gender. Some roosters never grow spurs, and sometimes hens will grow them.

 

[BantamLover21]

Brother and sister.

 

[Free Feather]

Brother and sister. They typically crow long before they get spurs.

 

[kidcody]

It looks like you have a brother and a sister, the best of both worlds, best to you in your beautiful white chickens!

 

[drumstick diva]

Big brother and sister

 

[Michael OShay]

Brother and sister.