I think the DC3 had 8mm glass windscreens. But it flew so slow, are you sure the goose didn't strike the DC3 and come in through the tail from behind?
I got struck by the world's most stupid pigeon. After landing and taxiing back towards the apron at Gatwick, I saw it flying straight at me from the side, and thump into the fuselage under the pilots window. Quite some feat- fly into a 737! I think pigeons must have their own version of the Darwin Awards. I have to confess I was too embarrassed to put a 'bird strike on the ground' entry into the Tech Log.