A zoo in Denmark is asking for donations of small pets as food for its predators.

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 euthanised” by trained staff.

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.”

Know the news with the 7NEWS app: Download today

The zoo points to guinea pigs, rabbits and chickens as possible donations. After being euthanised, the animals will be used as fodder, the zoo said.

“That way, nothing goes to waste — and we ensure natural behaviour, nutrition and wellbeing of our predators,” the zoo said.

The online call for pet donations is accompanied by a picture of a wildcat baring its teeth with its mouth wide open and a link to the zoo’s website, noting the facility also is interested in receiving horses.

The zoo, which could not immediately be reached for additional details, does not list other pets or animals as possible donations.