Why are my cat’s ears scaly and scabby?

Dear Most Esteemed and Knowledgeable Kitties:
I have an 8-month old, black and white, short-haired cat named Whiskey. He seems to be having a problem with his ears: they are very scaly. He is constantly growing new skin in his ears, but it sheds in little pieces afterwards. Just like a scab that falls off, only [...]