Charlie has been making an odd little whistling sound that I thought might indicate a cold. But he has no nasal discharges, no sneezing or coughing and nothing is off about him -- his appetite is good, his eyes are clear, he's steady and vocal. His droppings are normal.

I first heard the tiny whistle when he was approaching Lucy to have her preen his head after emerging from captivity.

So, is allopreening "it"?

Or is it a heretofore unobserved symptom of early stage aspergillosis?

What a neurotic mother I would be.