Good to know. I hope I was coming across as speculating, and not as if I KNOW. Mine never had losses to breeding birds (only younger birds). But I meant it just seems reasonable to me that geese could be affected by a trauma. Thanks for the additional info.
How recent was the attack?
I'm not sure about it, but if it JUST happened, maybe they are not feeling secure? If it was some months or years since then, I'd have to wonder another cause. Are you SURE of the sex of the remaining birds?
But first yes, I'd wonder if the attack was VERY recent...