Black Jersey Giant?

[mshuntjump]

This cockerel is the offspring of my Blue Jersey Giant Roo and my Black Australorp hen. He is a tall fella. Almost taller than his full grown father- he is 17 pounds and 27 inches tall, but definitely hasn't filled out yet. My question is, would he be considered a Black Jersey Giant since the bottom of his feet are yellow?

 

[mshuntjump]

His father:

 

[ramirezframing]

if you know his mom is not a jersey giant than he is a mix

 

[hdowden]

if you know his mom is not a jersey giant than he is a mix

x2

 

[mshuntjump]

Thank you!