@relic626 What assumptions do I have to make after 29 chapters? It's up to the animals if they want to communicate with humans or not. They communicate just fine with each other. If you had been rotting in some prison camp for 10 years for no reason of your own but just because you happen to be who you are, would you want to chat friendly with the staff of the camp after you finally escaped the place? Even if there was some dude who occasionally came and played with you, to take a little bit of your absolute boredom away? If you did, you could call it your Stockholm syndrome.
Like I said, the MC had no human friends, he only had the animals. He wanted to love them but even more than that, he wanted them to love him. He probably believed they did.
I never said he should have become a terrorist and release the animals. I'm no animal rights activist. However, it doesn't change the fact zoo animals are often stressed and unhappy. Especially the predators, primates, and such.
I believe I'm reading the manga for what it is. It's about grotesque animal-human hybrids and brutal scenes. The story is nothing to write reviews about and the characters are one-dimensional.