I bought what were advertised as Buffs at my local feed store and what I ended up with are white pullets that lay medium/large light blue/grey eggs. Only 1 of the 4 baby "Buff" chicks was actually a Buff. I've done a little research, but I have not found mention of a white breed that lays blue eggs besides the possibility that they're white Ameracunas. I do have 4 Ameracunas but they are more typical looking of that breed and lay smaller and very blue eggs. Any ideas? What have I missed? Thanks!