For a major European zoo, there are still a few of the larger Cologne exhibits that are not represented in the gallery, among others the whole Clemenshof area. I'll try to complete the "collection".
Clemenshof is the children's/petting zoo of Cologne Zoo, housing all of the zoo's domestics and opened in 2014. For a children's zoo, it's relatively well-done (if you can stand some thematization), even though children's zoos probably aren't the places where most of us spend the most time.
I was there in July,, but have to admit, I didn't even give the farm area a glance! Not really what I travelled to Germany for, but thanks for posting the farm photos
As I mentioned, I didn't exactly spend a long time there either, but well, I guess I just have a slight obsession with seeing everything a zoo has to offer, even if they're animals/exhibits I could easily live without.
And even though a pig or a cow in itself isn't that exciting, it's still interesting to see how different zoos have different ways of exhibiting them.
