[Fiction question] Can you help me with a description of some geese?

I am writing a scene in which geese burst into a suburban living room, pursued by a little man dressed as a garden dwarf.

I meed to know some things about the geese, which are white, noisy, and big:

1. How tall are they?
2. About how much do they weigh?
3. As they flap and flail about, do they shed feathers?
4. Can they fly at all? Can one get upstairs to a bedroom?
5. Are they likely to scatter poop around, and what is goose guano like?
6. What do they sound like?
7. Will they bite, or try to, and what are their bites like?
8. Can you pick one up, and if so, how?
9. What else should I know before the dwarf herds them out?

I know we have at least one goose expert around here, but any knowledgeable comments are welcome.