Just got our 4 chicks on Friday and all seem to be well with the exception of one that is not growing as fast as the others. She also had poop sticking to her "bum" and when I gently wiped it off with a damp tissue it appears that the area around the anus is bulging...underneath the skin. The chick is eating and drinking but definitely is the runt of the group, although the others are not picking on her. Will this "bulging" disappear in time or it is something to be dealt with now? Thanks for your comments.