What is this Mystery Bonus Chick I received?

[CarolinaHens]

I received my 15 Buff Orpington chicks this morning and received this "bonus chick" with them. Any idea what it might be?

He/She is brown with a little black speck on the top of the head.

 

[CarolinaHens]

Here is a better photo.

 

[Perfect Polish]

RIR maybe. my rir chicks looked like that when i bought them.

 

[CarolinaHens]

That is what my SIL thinks it is. I guess I will have to wait till it gets a little older to be sure.