I agree - they all look like roos, but...... I'm not 100% sure that they all are. The one that you thought might be a barred rock looks like a male Black Sexlink and the white chick under that is a Red sexlink -- red sexlink males are mostly white with a little red and females are red with a little bit of white (Illia's right - sexlinks can be sexed at hatch by their coloring). I don't recognize the other chicks' breeds - could be sexlinks also - especially the barred one at the top or could just be mixes.
The very bottom chick is colored like a female black sexlink (Black Star), but the wattles and comb are large for a 4-5 week old pullet. Your chicks do look a little older than 4-5 weeks - is it possible they are 6 weeks old or even 7-8? If they were newly hatched or only a few days old when you picked them up, they would have had little to no feathers. If they are older than 6 weeks - I'd watch the bottom chick - if the wattles and comb don't grow any bigger in the next few weeks, it might be a pullet. I'm also reconsidering the top chick - it looks rooish, especially with that splash of red on its shoulder, but the comb is pretty small for 6 weeks or older.
Do you have any pics when they were younger or can you double check their hatch date? The exact age is a big determinate in sexing chicks this young.
The very bottom chick is colored like a female black sexlink (Black Star), but the wattles and comb are large for a 4-5 week old pullet. Your chicks do look a little older than 4-5 weeks - is it possible they are 6 weeks old or even 7-8? If they were newly hatched or only a few days old when you picked them up, they would have had little to no feathers. If they are older than 6 weeks - I'd watch the bottom chick - if the wattles and comb don't grow any bigger in the next few weeks, it might be a pullet. I'm also reconsidering the top chick - it looks rooish, especially with that splash of red on its shoulder, but the comb is pretty small for 6 weeks or older.
Do you have any pics when they were younger or can you double check their hatch date? The exact age is a big determinate in sexing chicks this young.