Yellow and Green legs in OEGB x Japanese Bantam

[calychicken]

I have two OEGB x JB pullets that are siblings, and one has yellow legs, and one has green ones. The specific types are Silver Duck wing OEGB, and Black JB. Any idea why they have different leg colors?

 

[WoDia]

@Yardfarmer

 

[calychicken]

@Yardfarmer

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[WoDia]

?

I tagged him. He raises beautiful OEGB. He can help you with this.