13 week old buff Orpington gender?

[Pigeony]

Cockerel

 

[SJsChickies]

We hatched this chick 13 weeks ago, and it is smaller than the other known roosters, comb was always a little bigger but just now started to turn pinker. It is much smaller than any of the other 13 week olds we have and more than half the size of the 16 week olds we have. It is full Buff Orpington from full size rooster and hen parents. Any ideas if this is a boy or a girl? A very friendly chicken so I thought it was a rooster as a chick on that alone. First buff Orpington so I'm wondering if they are just nice!

Has it crowed yet? Or comb gotten very red? How’s it doing after the attack?