Does that involve a compulsory vetinary inspection? If so, no self- respecting vet should okay those conditions. The problem is they sometimes don't know/ aren't aware what is or isn't normal for wild species... QUOTE]
During a zoo inspection there are usually two qualified zoo inspectors, a vet and the highest member of the animal department. The vet is usually the one most closely associated with the collection, as they can answer any queries that the zoo inspectors have. One of the zoo inspectors also tends to be the council officer that deals with local zoo licensing. The other inspector could also be a vet.
I cannot comment on the particulars of WMSP in reference to their hippo enclosure as I have not seen it. However a very good system (active filtration) is in place at Whipsnade to deal with the ever present effluent problem, though I accept it only has a couple of animals to cope with.