The Guests always threw Pizza in the Water Pit of the Okapi Enclosure. It seemed to help to place Signs at the Enclosure but now the Animals are always getting sick and I think that's the Reason because the Immunity is at 100%. I've already tried to get rid of it trough emptying the Water Pit, build a Ramp and call a Zookeeper. But it didn't help. Do the Animals need to eat it or is there a Way to get rid of it?