Pet dogs also eat poo on occasion, also without any underlying problem, so I really don’t think there’s any reason to think that far less domesticated species where it is well established would just stop. I’m sure you can reduce it, especially if it has a nicer food source, but still, an animal with far less history of domestication seems like a recipe for amplification of all the potential issues you don’t want to deal with.
Pica is eating things that are not food, but as pointed out in the article I linked, eating dog poo is providing a significant source of nutrition for foxes. In those circumstances, it by definition is not pica.