A zoo in Europe is inviting the public to turn unwanted pets into prey, calling for donations of fluffy rabbits and family guinea pigs to be euthanized and fed to its predator residents.

The Aalborg Zoo in Denmark announced the program in a Facebook post, sparking public uproar, including the ire of the People for the Ethical Treatment of Animals (PETA).

“If you have an animal that, for various reasons, needs to be rehomed, you are welcome to donate it to us. The animals are humanely euthanized by trained staff and then used as feed,” the zoo wrote in the social media post. “In this way, nothing goes to waste — and we ensure natural behavior, proper nutrition, and well-being for our predators.”

The zoo said private individuals and businesses can donate chickens, rabbits and guinea pigs, which organizers said make up an important part of predators’ diets.

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Specifically, the zoo said the Eurasian lynx requires “whole” prey animals that resemble what it would naturally hunt in the wild.

“In zoos, we have a responsibility to replicate the animals’ natural food chain — for the sake of both animal welfare and professional integrity,” employees wrote in the post.

The zoo is also accepting horses, noting owners “can join us all the way if you wish.”

In a statement provided to Fox News Digital, a zoo spokesperson said fur and bones are part of the zoo animals’ natural diet.

“For many years at Aalborg Zoo, we have fed our carnivores with smaller livestock,” the spokesperson wrote. “When keeping carnivores, it is necessary to provide them with meat, preferably with fur, bones, etc., to give them as natural a diet as possible.”

They added the donation of pets to be used as prey is common in Denmark, and “many of our guests and partners appreciate the opportunity to contribute.”

“It makes sense to allow animals that need to be euthanized for various reasons to be of use in this way,” the spokesperson wrote.

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PETA weighed in on the controversial initiative, saying there is nothing “natural” about the donation request.

“It’s not ‘natural behaviour’ for predators from Asia, who roam and hunt for their meals, to be fed companion animals who originated in South America,” PETA wrote in an online news release. “Companion animals are never needed to ‘imitate the natural food chain of the [zoo’s] animals’ (as an Aalborg Zoo spokesperson described the program).”

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PETA added if the Aalborg Zoo “truly cares about animals,” it should focus on protecting species in their natural habitats.

The zoo later turned off the comments on its Facebook post detailing the program, citing “significant international interest.”

“We understand that the post evokes emotions and interest, but hateful and malicious rhetoric is unnecessary — and we encourage keeping a respectful tone,” leadership wrote. “We’re happy to elaborate and answer questions via private messages or email.”