NASHVILLE, Tenn. -- Drought and high feed costs could continue to restrict livestock markets in 2013 if conditions do not improve, according to Dr. David Anderson, professor and economist in Livestock and Food Products Marketing with the Texas A&M AgriLife Extension Service. According to a Jan. 14 American Farm Bureau Federation press release, Anderson addressed livestock producers from across the country during an issues conference at the American Farm Bureau Federation’s 94th annual meeting. . . .