museum director
vet keeps telling them we can't block off the rafters with chicken wire because they will hurt themselves on it somehow
It boils down to the Director and the consulting vet. Follow the advice of the vet.
Pull the foot open more and see if it's Bumble or if it's just debris that has wedged into the folds of the foot. Hard to tell, could just be a poop ball.
Loss of feathers on the vent could be a combination of picking, lice/mites - if you are finding parasites, treat per the consulting vet's recommendation.
Good luck!