Is it a boy?

Do you have a picture of him or her?

I am not expert at all, but I have 6 Orpington Chicks (well 4 at least, we are suspicious that 2 might be other breeds  ). They will be 6 weeks old on Wednesday, and two of them have combs and wattles that are bigger and much redder and I am convinced that they are boys. One of them we have been certain about since he was about 2 weeks old as his comb has always been bigger & redder than the others.

Our bigger Orpington Hens did not come into lay until they were about 20 - 24 weeks (one was 18 months old  ) So the combs on girls should be pale at 8-10 weeks, and small.

As I say though I am no expert, might be worth letting the breeder know that you have doubts, especially if you bought them sexed. Ours were bought at 3 days old, so we knew that there was no way of knowing. ( We are taking back the two that we think aren't Orps, just to be sure  )

The one at the feeder would appear to have a bigger comb.

I posted some pictures of mine on the 7/6/11 it called Orpington Chick Pics One. The first picture is the chick that we have been sure is a cockerel since about 2 weeks old, take a look and see if he compares to yours.

Hi, help needed quickly, I have my 3 8-10 week old chocolate orpingtons and one has a slightly bigger comb and has made silent crowing movements, is it a boy??? Or do hens do this movement too?
If I know now i may be able to swap with the breeder

What do you mean by silent crowing movements?  If you mean stretching of the neck with the beak opening wide this could be it getting the food from its crop.  Looks as if it is gasping for air sometimes.  The food is stored in the crop and then the hen swallows small amounts which could be what is happening.  If so this is quite normal.

Sorry I don't know Vicky.  My Black Rocks all developed at different times and still have different sized combs.  They are sexed at day old and I don't think they can be mistaken.  I would wait and see if anyone else can identify yours.

He's gone!!! My OH took him back to the breeder who still thought he was a hen, until he went back in her run and looked nothing like the others.

We now have a hen (I hope) with very little comb at all 

Knowing my look, the 3 we have will all be cocks!!! We have Flo - No comb, Doris - Slight comb, and Christina - Normal comb 

Sorry I don't know Vicky.  My Black Rocks all developed at different times and still have different sized combs.  They are sexed at day old and I don't think they can be mistaken.  I would wait and see if anyone else can identify yours.

If yours are definitely black rocks ANHBUC, then they are definitely girls!  All boys are culled at hatching from Eddie Lovatt's hatchery in Scotland.  And he doesn't sell hatching eggs.