I have three 3-week old chicks (black silkie, buff silkie,and plymouth rock) and just got a 5-week chick (rhode island red) to replace an Ameraucana chick that recently passed away. My husband and I tried to introduce the 5-week old chick to the current flock, but she kept trying to peck the younger birds' feet. We realize that this may be just what happens, but we're worried that the 5-week chick will hurt the others because she's so much bigger. Is this normal? Does anyone have advice to how we can introduce them? We currently have the 5-week chick in a separate box but I can tell she'd like to be with the others! Thanks!