I have 2 little (6 weeks old) splash Silkie chicks... One has the cutest fluffy little hind end and the other is completely bare bottomed?? I can't figure it out... I have checked all over them and no bugs... They were medicated by the breeder when I got them and I kept them on medicated chick feed. I just don't get it... Anyone have any clue what could be going on? Or am I going to lose one of my babies 
