I have a ‘runt’ hen, she’s 7 1/2 months old. She’s always been the smallest, she’s also the youngest by 6 weeks. She’s, what I was told, a Columbian Plymouth Rock. She’s smaller but more shockingly, she’s much lighter than the other 7 hens (2-14 months old (GLW), 5-10 month old (3 GLW, 2 Blue...