By Blake Nicholson
Medora, North Dakota (AP)

The number of elk roaming the nation’s parks is booming, and that’s bad news for them.

A debate has started among wildlife and conservation officials about how the animals should be culled – by sharpshooters’ bullets or by their natural enemy, wolves.

The National Park Service has no firm estimate on the total number of elk in national parks, simply because they live in the wild and migrate in and out of many parks.