I have a GSD. He's 10 months old now. We got him desexed last week. These days we found that he lost certain amount of hair on one side of his nose. The other side is still fine. He's not itchy around that spot cuz I haven't seen him scratching. The skin was perfectly smooth (not flaky). The hair was simply gone. Does anyone here know what could be wrong?
Here's the picture (sorry it's not that clear cuz I took it with my mobile phone, can't find my digital camera...lol)