Sorry to hear about your goose.  If you get another, a good pen is in order.
Not to hijack the thread, but this afternoon there was a commotion out back, and since the geese don't usually fuss too much during the day, I went out to see what was up.  
My gander was in full fighting mode and when I went around the side of the house I saw why.  Our neighbor's little chihuahua squeezed through our back gate and was in the yard with the geese.  He was definitely trying to find the exit as quickly as possible.  My guess is he found out that messing with an enraged Chinese gander was not a very good idea, especially since the gander is at least three times his size.  I doubt the little varmint will come back again.  Serves him right. I hate the little twerp anyway, since he likes to chase cars and nip at heels.
After I shooed him out, I went back to the gander, who promptly decided to bite me, and checked him out real quick.  He had a little scrape right on the end of his knob that looked almost like a broken dried blister on your hand would.  No blood, and since he was riled enough to try to take me on I just let him be for a little while until he calmed down.  
Went back outside a little later with a handful of pellets and he came running over like nothing had happened.  He was fine.  I figure he could have gotten scraped anywhere, since he's always banging into things anyway.  I'm actually surprised he doesn't get banged up more often since he's the klutziest bird alive.  
I didn't check the neighbor's dog, but I hope he's got a couple of nice little souvenirs for his trouble.