Help! I feel terrible not noticing this before but 3 of my welsummer chicks are having problems. We have them in a brooder with about 20 other younger chicks... could the younger chicks be hurting them? I feel like their brooder is clean but maybe it needs to be more clean? The one pictured with the black scabs on its feet isn't doing well which is how it caught my attention, she's moving very slowly. The one with the reddish swollen ankle seems healthy but I'm obviously concerned. This is my first batch of chicks so please any advice will help!