BjG pullet or cockeral?

[S_hicks88]

Ok so i have 4 chicks that are 1 month old 2 bjg 1 buff orp and 1 gold wyandotte. 1 of my bg only has a nub for a tail, half wing feathers and a larger comb then my other 3 it is also my noisiest and scaredy cat. My other 3 have tails and full wing chest feathers already. Do i have a roo?

 

[S_hicks88]

For comparison this is my other bjg

 

[Frazzemrat1]

I see no indicators of cockerel at this time. Wait until its 8 weeks or so.