Ashes of Al'ar

When I was farming for ashes of Al’ar, I was doing the boss fight with Kael’thas, after killing its minions, and before she floats up, I had a bird that looked like Al’ar show up to the right of her, and then turned into an egg. While fighting her i ended up breaking the egg. Now I’ve done this run numerous times but never noticed this before. Did I mess up and kill my mount i was farming?