Is my chicken a rooster?

[bengalstar]

2 months ago we bought 4 "hens" and one of them is leading me to think its a rooster. The possible rooster, named Teeter is a Delaware. Teeter is starting to make different noises than the hens make, so I'm concerned "she" is actually a cockerel. Teeter is 2 and a half months old. I'd love to here your answer, pullet or cockerel? (More pics below)

 

[Syerf]

Would it be possible to see a picture of him/her?

 

[bengalstar]

Yes, I thought I had 2 pics, but they didn't show up.

 

[bengalstar]

 

[bengalstar]

 

[Syerf]

I'd lean towards pullet

 

[bengalstar]

I was able to get some pictures up

 

[juliechick]

Looks like a pullet about ready to lay.

 

[Firefighter Chick]

how old is she/he?

 

[hdowden]

how old is it? at this point if young i would say a cockerel but if it is 20+ weeks then pullet