For educational purposes, we are presenting a few typical cases here pictorially. It comes with a strong warning: There are many other dermatological conditions which these pictures could represent. To date, there is no scientific test that can isolate what is known as Alopecia X. Only after all other veterinary tests have been conducted and possibly some treatments rendered should Alopecia X be used to identify the case. Alopecia X refers to baldness of an unknown origin.