Western Europe doesn't really have an issue with overpopulation and resulting kill shelters for cats and dogs. In fact, all of my friends with dogs have to import them from Eastern Europe. So, I really hope they're not getting cats and dogs donated to them...

But, they also explicitly say "chickens, rabbits and guinea pigs." Not sure how many these unwanted pets there are that it will feed their animals much...

But it also seems like this article suggests this zoo has a history of unnecessary euthanization of zoo animals and feeding to other animals...