One chick "challenging" other chick while making a weird noise?

[loohoo]

We have 6 Buff Orpington chicks, a little over 3 weeks old. There is one who I am 99.9% sure is a cockerel, as he has a red comb, wattles, and his behavior/personality is very, very rooster-y. We've named him Bird (Burt) Reynolds.
4 have feathered out beautifully and have long fluffy tails, 2 have very hen-like personalities while the other 2 are more outgoing/assertive. I feel pretty good that they are pullets at this point.
And then we come to the one this thread is about. From day one, this one has been smaller, slower to feather out, and it just wasn't fiesty at all. Well, this morning my husband heard a funny noise coming from the brooder, it was like a low "brrrr" sound, and when he checked it was this one bumping chests with Bird Reynolds. This chick is starting to get a bit of pink now to its comb and has slightly pink wattles just beginning to show. Truthfully the feathering is similar to that of Bird Reynolds, in that they both have short, small tails compared to the other 4.
I just heard the same thing a bit ago, and same scenario...cockerel chick was minding his own business and this one was "brrrrr"-ing at him, standing really close to him, almost looking like he was trying to stir him up....is this a thing? Lol

 

[LizzzyJo]

Chest bumping is totally normal. It doesn’t even strongly imply gender. It may be that bird Reynolds is a boy and the rest are all females or bird may be a feisty girl headed to the top of the pecking order. It’s just chick games. Sit back and enjoy.

 

[loohoo]

Chest bumping is totally normal. It doesn’t even strongly imply gender. It may be that bird Reynolds is a boy and the rest are all females or bird may be a feisty girl headed to the top of the pecking order. It’s just chick games. Sit back and enjoy.

Its very entertaining, thats for sure! The noise was new, I've never heard any of them make that noise before...it was actually kind of cute! Lol

 

[aart]

Red comb and wattles and the 'burrurr-ing' noise certainly indicate a male.
If you can observe his posture when he makes that noise, might help confirm it.
Had a cockerel that started 'crowing' at 1-2 weeks old.
I couldn't believe what I'd heard until I saw him do it.
Already knew it was male because they were sexlinked chicks.

 

[loohoo]

Red comb and wattles and the 'burrurr-ing' noise certainly indicate a male.
If you can observe his posture when he makes that noise, might help confirm it.
Had a cockerel that started 'crowing' at 1-2 weeks old.
I couldn't believe what I'd heard until I saw him do it.
Already knew it was male because they were sexlinked chicks.

Oh that's too funny!! I wouldn't have believed it until I saw it either!
Yes, I'm pretty sure we have 2 cockerels in there, this one's posturing was very rooster-y while making that "Brrrr" sound - standing straight up, chest out. Its just so funny because up until this point, he was very docile, skittish, not fiesty in the slightest, almost getting trampled by the others, and overnight, it's like he found himself! Lol