A zoo in northern Denmark is inviting the public to donate unwanted pets— and even horses — to help feed its captive predators.

Aalborg Zoo said in a social media post that it aims to replicate the natural food chain and offer its carnivorous animals whole prey, a diet it claims supports both animal welfare and natural behavior.

“In zoos, we have a responsibility to imitate the natural food chain of the animals — in terms of both animal welfare and professional integrity,” the zoo stated, according to an Instagram translation of its post.

The facility accepts chickens, rabbits and guinea pigs on weekdays with a limit of four animals per drop-off. The animals are euthanized on-site by trained staff and then used as food for predators such as lions and wolves, according to the zoo. (RELATED: Panda Conservation Projects Backfiring After American Zoos Dished Out Millions To China)

The program also extends to horses, although with stricter guidelines. Horses must not have been treated for illness in the past month, meet size and transport safety requirements and are euthanized under veterinary supervision. Donors may be eligible for a tax deduction based on the horse’s value, the zoo’s website says.

Zoo officials emphasized that the approach prevents waste and promotes healthy predator behavior. “Our needs vary throughout the year, and there may be a waiting list,” Aalborg Zoo noted.