Somebody touched two or more eggs, perhaps a stray Flare or AoE that someone threw out of habit.

Intended mechanics:
She gains 8 stacks for every egg that breaks from being attacked. It takes one attack to kill an egg. The stacks drop off gradually. She rages at 15 or 16. You can break one egg that's getting ready to hatch (preferably a spotted one, to prevent a Cockerel), wait for the rage to drop a few stacks, then break another egg.