Bumblefoot: What is it?

I was looking for a resource for someone with a duck that has bumblefoot and came upon this and skimmed it. I love how thorough it is. The font is very small to me but perhaps you did that intentionally. Good article though!

Article would better if there were not so many links. Maybe the author could write about all the links?

There's a LOT of information, here. It's a bit tough to get through, but important enough to read all the way to the end. Thanks!