Super obnoxious--is it a roo?

[eggspletive!]

Could this obnoxious 5-week-old bird be a roo despite the lack of comb? (I'm sorry if this is a stupid question--this is my first time keeping chickens.) It is constantly chest bumping the other chicks, chasing them around the coop, and jumping on top of them. The last pic is an action shot I accidentally got today when it jumped on one of the other chicks and threw her out of the access door to the coop. Rude! Unfortunately this obnoxious thing is also my favorite, as it is the most friendly, docile, curious, and intelligent.

What do you think? He/she/it?

 

[PotterWatch]

At this point it looks like a pullet. Could change, but it doesn't show any roo signs right now. Hens can and do exhibit dominant behavior like chest bumping and jumping on the others.

 

[catdaddyfro]

Easter Egger/americauna: has puffy cheeks and willow-green feet.
as far as sex still too young to tell and they dont usually show early signs of maturity either

 

[Goose and Fig]

Oh what a cutie! I can't tell if it's a he or she, but from my experience- rooster chicks seem to be alot more friendly and curious. Always tilting their head and looking you right in the eye...
Maybe that's why I have 20 and counting

 

[Rodeoclown1189]

most definitely a hen at that age a roos comb would be more red

 

[Sonoran Silkies]

Behavior is not a very good indicator. I have a hen who acts as you describe.

Physical traits are far better indicators of gender, although this particular bird may be too young to tell. Different breeds (and individuals) mature at different paces.

 

[speckledhen]

Looks like an EE pullet to me.