Hen or Roo?

This chicken is about 6 months old. We had an issue with feather plucking and this one seems to be the biggest culprit. They get 20% protein all flock. I separated this one to let the others heal and I'm making some saddles but the odd thing is this chicken hasn't laid an egg in the 5 days it has been in isolation. I didn't think it was a rooster because I havent heard any crowing, no signs of spurs. Wyandottes are so hard for me to ID as a newer chicken owner.

Could it be a late bloomer (either as a roo or hen)? Could it not be laying because of isolation? (Never had that problem before)