Montana ? A newly opened paintball course in Montana had to shut down after odor from disintegrated paintballs was luring possibly dangerous guests: bears.

Big Sky Marketing Director Dax Schieffer says the resort tried to find an environmentally friendly paintball. But it turned out that the one selected contains a vegetable oil that can attract grizzly and black bears that commonly roam the region.

A wildlife official says that some bears were even eating unexploded paintballs.