The sign states that they are Arctic foxes, though they looked more like domestic farm foxes to me (especially since wild Arctic foxes cannot be kept in private hands in Denmark).
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Enghave Dyre- og Naturpark (Enghave Wildlife and Nature Park) is a small farm zoo near the town of Brørup in southern Jutland, Denmark. It keeps around 40 species of animals, mostly domestics, but also raccoons, coatis, and a few species of exotic birds. It's not a licensed zoo, but rather a "besøgslandbrug" ("visitor farm"), meaning that they can only keep species that are allowed to be kept in private hands.
While the exhibitry standard is mostly fine, the collection is very generic, and you can walk through the park pretty quickly, so it's not really anything to go out of your way for.