Random Blackbeard for no apparent reason: my 16 month old, Potato, has never shown signs of distress and only shows the black beard when something irritates him (like the dog barking at his glass, etc.) In the past two weeks he has popped out his beard and has turn black for no apparent reason. He is alert and has his head up and looks fine except for the black beard. Is this something I need to be concerned with ? Nothing has changed and temperatures have been the same. Any help greatly appreciate it!