I have two identical albino rats, they are both very skittish too. I can not tell them apart and have named them accordingly, Mango and Tango. Does anyone else have this problem? If so, how did you make it easier for yourself. The only way I can tell who is Mango is by offering a treat, one does not like any food besides lab blocks while the other one eats everything. Yet, they are so skittish that it is not always an option to tell them apart this way.