The Aalborg zoo said it is trying to mimic the natural food chain of the animals housed there "for the sake of both animal welfare and professional integrity" and offers assurances the pets will be "gently euthanized" by trained staff.
6abc.com

Denmark zoo asks people to donate their small pets as food for captive predators
The zoo in northern Denmark explained in a Facebook post that "if you have a healthy animal that needs to be given away for various reasons, feel free to donate it to us."