well, by September, she should be good and tame. Just pen her up, and carry her with you whenever you are out in the barn. I have gotten lots of show roosters tame that way.. its never a good thing to fly up in the judges face and try to peck thier eyeballs out, LOL. good luck,
I know nothing about Sumatra standards, but just wanted to to say those are some nice looking birds. I love that red black hen, too bad she is so flighty.