Extra keepers worked with my huge elephant enclosure but yesterday I built a Safari habitat with the jeep tour ride that was just a bit bigger than my elephant habitat. It had 6 different kinds of animals in it and I assigned 4 keepers. I had no problem meeting all the different animals needs and each was near 100% happy. However, this time I had hungry and starving animals. Adding more keepers isn't the answer because only one feeds animals at a time (seemingly once an ingame month) and there is too much for one to do with the various feeders for the different types of animals. The feeders are spread out and he can never get to all of them so some animals don't get to eat. All keepers have 5 star training, are set to a workzone with just what they need - habitat, hut & staff room - and the staff room is set to the perk that gives them extra energy. Animals are all on grade 3 food. I'm in Sandbox so there isn't anything I need to research to make it work. Kinda frustrating.