What breed is this?

[brownrhi]

 

[Pyxis]

Red sex link, not a real breed but a hybrid crossed to be able to tell the sex at hatch by its color.

 

[drumstick diva]

agree

 

[donrae]

Yep, red sex link. they're sold under several trade names like red stars, cinnamon queens, golden comets, etc.

 

[BantamLover21]

Red Sex-link.