I know there are several comments in existing threads but I thought maybe get a thread dedicated to just this topic???

That being said, what is the best material to use in my BB house?

I read that surgical cotton is too fine and they become entangled. What about synthetic pillow floss? It is similar, if not the same, as aquarium floss.

I have 8 dogs so I plan to use a lot of the downy fur from them (Siberian Huskies). I think that would be nice. The birds and the mice seem to love it!

Any other suggestions?