I am new to this, so some help would be most appreciated... I did some trading for 8 juvenile Barred Rocks that the owner did not know what sex they were. I cannot tell so I am posting this asking for HELP!
I agree, I doubt this was an honest mistake. That person knew exactly what s/he was doing, s/he knew these were all roos. Barred Rocks can be accurately sexed by color once they feather in. Basically lighter overall coloring = roo, darker = pullet. Here's a pic of three young Barred Rocks, a roo and 2 pullets, post #4: https://www.backyardchickens.com/t/862568/rooster-or-hen-at-6-7-weeks Plus, just by the combs alone, anyone who has raised straight run chicks a few times would know that these were all males.
I hope you can find some Barred Rock pullets to replace these. At least you know now that these are all males rather than finding out later after putting a bunch of time and feed into them.