First time chicken owner here! I bought 2 chickens about 2 weeks ago for my kids and they've been great. However, this morning we heard what sounded like a cock o doodle (but not quite). We're now thinking it's a rooster. The person that sold it to us said it was a hen when we bought it. It was about 4 months old at the time so it should be about 4 1/2 months now. Can you please tell me if it's a rooster or a hen? Thank you so much! Pics attached.