Do you have pics? If it's laying white eggs, I agree - it must be some other kind of mix and not a red sexlink or rir after all. Red sexlinks don't breed true - maybe the seller bred his original RSLs to each other without knowing this.
I know you cross a white chicken with a red chicken to get red sexlinks, but I'm no good at genetics and don't know whether you can use a leghorn as the white chicken. If so, that could explain the white eggs and the fact that it's not a first generation sexlink would explain why it wasn't able to be sexed by color.
I know you cross a white chicken with a red chicken to get red sexlinks, but I'm no good at genetics and don't know whether you can use a leghorn as the white chicken. If so, that could explain the white eggs and the fact that it's not a first generation sexlink would explain why it wasn't able to be sexed by color.