Oh, wow! I have been looking for an update on this mystery! Thanks!
I have NO idea what to do with the broodiness. They're keeping you on your toes, aren't they!
Your Aussie looks like a girl to me. I hope (and think) you have three hens. And I thought it was good news that you've had only three crowing episodes in the past three weeks. My rooster just started crowing and he's crowed probably 4 of the last 7 mornings.
I am new to all of this too, and I appreciate your "wait and see" approach. It seems from what I've heard, within a couple weeks the crower will start crowing all day and it'll be clear who the culprit is. Then the next trick will be to see if the crower is also laying eggs. I liked the idea...