I started my own rat colony about 2 weeks ago and hand selected 12 females and 6 males to get it started all from the same source. Everything has been going great and everyone seems to be getting along, but today when I came home from work and did my rounds I noticed one of my favorite females missing hair. Has anyone ever seen this and if so do you know what causes it?







Should I separate her from the rest of the group and is there anything to do for it?