What happens: Animals are starving. When I trace down their keeper, he (has always been a male keeper so far) is in the keeper hut going through the motions of opening the fridge and chopping food without actually opening the fridge door and the food is invisible. He keeps doing that in a never-ending loop. Firing and replacing him seems to work. Since it takes a while that animals start starving after being placed, it seems that the keepers have been bugged right from the moment I hired them.
I had this happen three times by now, twice in the same Career mode zoo. The first time might also have been a Career mode zoo since I am currently trying to do them all at the hard level, but I am not sure. Since I fired and replaced them, I don’t think there are any useful save games available, but I will keep an eye on my keepers from now on until I get another loopy keeper so I can officially file the bug.
I had this happen three times by now, twice in the same Career mode zoo. The first time might also have been a Career mode zoo since I am currently trying to do them all at the hard level, but I am not sure. Since I fired and replaced them, I don’t think there are any useful save games available, but I will keep an eye on my keepers from now on until I get another loopy keeper so I can officially file the bug.