I think there were a lot of animal conservation groups upset about that one. WDW had to make a lot of "modifications" to keep them from raising too much of a stink.
I seem to remember hearing about certain soundproofing measures that WDW had to make to ensure they did not stress out any of the animals. Sounds like a good idea to me, but probably something Disney would have taken care of anyway. I think they treat the animals "admirably" (did I spell that right?)
Beca