I have noticed an increase in unhappy zoo keepers. Nothing has changed in the zoo, what so ever.. Here's the thing.. I have had a few keepers just in the last couple of days quit and walk away from their job. i have all my facilities at 100% scenery.. I can even turn on the staff bonus (which agitates me as it always turns off) and they still lose happiness.. If with smaller enclosures, they are unhappy or over worked.. seems overworks in a serious problem with all staff.. I have them all sectioned off in work zones.. all the staff.. I have one keeper to each enclosure.. and the problem still persists.. Something has to give..