buttercup chick?

[plymouthrockFarm123]

i have recently got 25 brown sex links and one of them is different it is coco coloured with a dark brown splotch on its head with a stripe of dark brown with black outlinig it on its back and a black lines thru it eyes like eyeliner

sorry no pics

and its only 2 days old

 

[HeadHen]

I got an order from MM that had an exotic that byc users think maybe a buttercup. She sounds just like yours. Users and myself have posted a lot of pics that might help you. Here is the thread
https://www.backyardchickens.com/forum/viewforum.php?id=15

 

[plymouthrockFarm123]

now that i look closer it looks like the other chicks but really dark