Hello - I just received my first 5 chicks ever. They have been home in the brooder for 3 hours and 4 seem to be thriving and 1 seems to be struggling. The chick has been drinking a little water and eating a very small amount but is listless and much less active than the rest. I checked to see if she may be pasted up and noticed that there is a dried up very dark brown/red mass where I believe the umbilical cord must be attached. It is not a thin black string as described there may be. I would call this a scab except it is not fully attached to the chick. The other chicks seem to be being nice to her and not pecking at the area. The down around the area is matted and also sort of dried seeming. The chick is a white wynadotte bantam. Should it be cleaned or some sort of antiseptic applied? I would very much like to help this little chick so any advice at all would be much appreciated. Thank you.