I think its a barred rock but the only similar one to the is a cuckoo marans.
They both get much lighter as they grow and then get that striping.
They look very similar when grown but barred rocks stripes are a little more crisp, defined.
I am going to say barred rock.
Here are some pictures for you to compare with.
http://images.search.yahoo.com/imag...&sigi=11gr7j2tv&sigb=128d55vrd&sigh=11edh13k0
They both get much lighter as they grow and then get that striping.
They look very similar when grown but barred rocks stripes are a little more crisp, defined.
I am going to say barred rock.
Here are some pictures for you to compare with.
http://images.search.yahoo.com/imag...&sigi=11gr7j2tv&sigb=128d55vrd&sigh=11edh13k0