buff orpington chicks what sex are they?

[liam345]

hi i have some buff orpington chicks can you help me sex them they are 9and a half weeks old

 

[seminolewind]

Number 2 looks male, #4 looks female.

 

[peggym]

First 2 pictures are Roos!!! Out of the other pictures, I got one postive pullet. You can usually tell from tail feathers and saddle feathers.