Just wanted to now if anyone had some advice for adding new 2 week old chicks to my existing flock of 1-2 week olds? The hatchery is replacing the chicks that we lost, but I'm a little nervous about adding them into the brooder. We have 2 silkies in there already who are about 3.5 weeks old, and the remaining 8 chicks are 1.5 weeks old. These new chicks are around 2 weeks old and there will be 3 of them (speckled sussex, australorp and plymouth rock). Any advice would be greatly appreciated!!!