That is a great project! I'm so glad to hear the saipan roosters weren't mean. I have been a little nervous wondering how they'll be with my 3-yr-old (soon to be 4), considering they'll be nearly as tall as her once they're grown. Ours just turned 3-weeks old but are fun to watch and easy to tell which are girl/boy due to the feathering (the boys barely have any feathers yet). I think we have around 7 girls and 10 boys. We love roosters so I was hoping to keep them at least 6-9 months before eating them. Usually I just eat whichever roosters are causing the most trouble first (especially if any start to chase me) and it reduces the numbers before the hens get their backs too worn out. So far my most-aggressive cockerel ever (that really hurt me) was a 6-month-old lavender orpington. Maybe I was too friendly to him when he was younger, or maybe it was just extreme hormones he couldn't handle (very red comb and wattles, more than the others), not sure. We had an agressive polish rooster too once, but he was too small to hurt me and I felt sorry for him since the other chickens kicked him out of the coop every night and he had to sleep on top of the house.