The reason I ask is because I'm new to the chicken game and I recently bought 7 pullets from a women off of craigslist. She kept three roosters out of the flock that was then 10. She seamed fairly confident that what she was keeping was roosters, but I didn't bother to look at the time. So how likely is it that one of my pullets might be a roo? She sexed them at 7 weeks, and now its about 9 weeks, so should I being seeing any differences if they were roos? Here's a couple pictures of two of my biggest pullets.