But this thing could eat an elephant, seriously, the Baku is so huge I guarantee that it'd be awhile before the poison can course through it's body, and I'd even go as far to say that if it inhales the poisoned sand, it won't be affected seeing as Sasori's poison seems to have to enter the blood stream directly, like a venom, but there's no way I could believe that sasori's poison would work instantaneously on something so big, even if it's affected, it can clear out enough puppets to make Danzo's work easy