SHERIDAN, Wyo. (AP) -- Police in northern Wyoming say a rifle discharged after a dog apparently stepped on it, injuring a 46-year-old man. Johnson County Sheriff Steve Kozisek says the bullet struck Richard L. Fipps, of Sheridan, in the arm on Monday. The injury is not life-threatening but Fipps is being treated in a hospital in Billings, Montana. Kozisek told The Sheridan Press that Fipps and two others were in a remote area trying to move a vehicle that had become stuck. Fipps was standing beside his truck when he told his dog to move from the front seat to the back seat. The sheriff says a rifle was on the back seat and it discharged toward Fipps.