3 weeks Rhode Island Red, rooster or hen?

[zriz]

bought on tractor supply 4 chicks Rodhe island red, one of them picture #1 is bigger and have a prominent comb compare to his sisters i upload a picture #2 compare, if the # 1 a rooster? bought 2 weeks ago , i think they are around 3 weeks

 

[Silviaschicks]

1 is a rooster

 

[LadiesAndJane]

Number one is an early combing cockerel. Number two is too early to say one way or the other.