Sometimes blue can be pretty dark. I ordered a blue bird (from another company) last year and thought for sure she would be charcoal color. She has since lightened up into a dark grey but definitely different from my Black Marans. If the brown is coming through they can’t be BJG, the RIB can...
It depends. What was your order? Where did you order from? Do they substitute if your order is short? What chicks/how many do you think are the wrong breed?