4 Silver Laced Wyandotte pullets 15 weeks old-- 2 have rose combs, 2 have single combs?

[CluckerCottage]

They came from the same hatchery- does anyone have insight on this?
SLW's are supposed to have rose combs.
This is my first time owning this breed after many years of keeping chickens. They are so much fun to watch!
Thank you-
CluckerCottage

 

[sourland]

It is not unusual for hatchery birds to deviate in some degree from the SOP. I have heard it said that low fertility can be associated with 'non single' combs so single birds are frequently included in hatchery flocks.

 

[CluckerCottage]

ok, thanks so much for your answer.