1. From NorthStar VETS, Robbinsville, New Jersey (S.L.W.); Department of Small Animal Clinical Sciences (D.L., S.C.), and Department of Pathobiology and Diagnostic Investigation (K.J.W.), College of Veterinary Medicine, Michigan State University, East Lansing, Michigan; and College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina (N.C.N.).