sentences:  Keeping wild animals in zoos is even seen as human domination over other creatures.On the other hand, objective and science-based critique by the less extreme and recognized animal welfare organizations is usually well received and may lead to improvements of problematic keeping conditions in specific cases.The "umbrella organisation" worldwide for the world zoo and aquarium community today, the World Association of Zoos and Aquariums (WAZA) has a complaint procedure, allowing to follow up on complaints received from the public.