Is this a rooster?

[Chickenlickengood]

I'm pretty sure I know the answer, but I've got 3 who have been crowing for about a week, but this one has not. They are all 4 months old.

 

[Pigeony]

Yes, no doubt that is a rooster

 

[BlindLemonChicken]

X2

 

[BigBlueHen53]

Sorry, no, it's not a rooster. Not yet anyway! It's a cockerel. It'll be a rooster when it's a year old.