We hatched and hand raised several little chicks includeing serama , we got rid of everyone else and kept at the end 2 little serama hens and a little rooster. The hens can be picked up hey dont biter or stratch though they would really prefer to not be handled you can just tell. But they can be handled. The boy was the same way till recently , first it started small , he would hop up on my sons back when my son was scooping up a hen , lately though he will actually charge up and bite or jump to scratch my sons hands and arms when he tries to put fresh food or water into there cage ( they are in door pets) . This last time was the worst and although the peck/bite didnt break the skin my son now has a big blood blister type owie and is very p o' d at the rooster. Do they get more agressive , they arnt treated poorly , my son dosnt do mean stuff to them , there arnt any kinds of preditors or anything thats stressing them out and they have been hand reared from day one. SO whats up with the tude , I have been picking him up and holding him till I feel like letting him down and he has to be quite and docile befor I do but although that helps with me he still goes after my son . Being a serama he is really to small to eat lol he would make a tiny boney little carcass.