The fluid gets explained. The chicken was explained in the scene, they said if he's feral, which means his mind is gone and he'll attack without reason, the chicken would set him off. Yes, ghouls live long lives, be they feral or not.
Not yet but UFC 304 is in Manchester and those times are what they're doing. And as both UFC and WWE are under TKO it wouldn't surprise me if they tried the same at some point.
I actually enjoyed the first one, but getting to the 1 million flashbacks in a row made me stop the second. It's so atrocious that I imagine the director's cut that Zach 'Only Director in the World to Never be Allowed to Make the Movie he Wants'...