growth?

[AtRendeAcres]

I have 1 week old chicks from hoffmanhatchery.com

some look like they have a gowth right side breast

with one chick it looks like a golf ball

the others it is very slight

does anyone know what this is??

 

[dlhunicorn]

..that is probably the crop you are describing:
http://dlhunicorn.conforums.com/index.cgi?board=photos&action=display&num=1158071735
(various anatomical illustrations)
here is a couple showing the crop:

 

[AtRendeAcres]

O.K.
it is good to know what it is

but 2 chickens seem to be much larger than the others!

is this normal to have an enlarged crop?