i think my kids favorite orpington is a roo...

[myfivegirls]

It looks like a roo to me - comb too red for being a pullet.

 

[OrpieOwner]

I would definitely say pullet. Here is a picture of my Roo to compare and my hen to compare. Also, your Orpington doesn't have a red comb that should be visible by 10 weeks.

I also believe that you have a lavender Orpington! That is the same breed I have, so I definitely think it is a pullet. But in case it isn't, watch out for attempts at crowing, strutting, look for saddle feathers and big tail feathers.

 

[OrpieOwner]

My Roo and hen are also older than your chicken, but I still see more resemblance to my hen than my Roo. Your chicken wouldn't have a comb the size of my rooster's at 10 weeks, even if it were a Roo.

 

[mother hen]

In the early weeks I felt as developing quicker then the others. But now it seems to have slowed and doesn't look as red as my more obvious roos. I will be keeping a close eye on him/her. I still hope it's a her