they're still young but I'm not gonna lie... they all look like girls to me
glen sorta looks like Nouba!!
even witht he flash I'm pretty sure they're all young females, try taking a pic in natural light with no flash. I think that would make them easier to see.
typically young males have purplier ceres, young females are whitish blue.
White is the best sign of a female. Their ceres are layered, blue, then white then tan. The layers show over time so if its blue it may still be female. just it's white layer didnt grow in yet...
The only problem you may come across is if you have 3 females and two males. the two largest females will beat up on the smallest so they have their mates to themselve. However 3 boys and two girls wont be a problem.... the males arent as posessive lol