Rachel Thompson,^*,** Tiffany M. Wolf,^** Heather Robertson,^** Margarita Woc Colburn,^** Alexis Moreno,^** Anneke Moresco,^** Anne Elise Napier,^** Sally A. Nofs<sup>**


*</sup>Correspondence should be directed to Dr. Thompson (Rachel.Thompson@state.mn.us).
^**From the Minnesota Zoological Garden, 13000 Zoo Boulevard, Apple Valley, Minnesota 55124, USA (Thompson); Veterinary Population Medicine Department, University of Minnesota, 1365 Gortner Avenue, St. Paul, Minnesota 55108, USA (Wolf); Nashville Zoo at Grassmere, 3777 Nolensville Pike, Nashville, Tennessee 37211, USA (Robertson, Woc Colburn); Reid Park Zoo, 3400 East Zoo Court, Tucson, Arizona 85716, USA (Moreno); Denver Zoo, 2300 Steele Street, Denver, Colorado 80205, USA (Moresco); Ultrasound Solutions, 12134 Old Hickory Boulevard, Hermitage, Tennessee 37076, USA (Napier); Potter Park Zoo, 1301 South Pennsylvania Avenue, Lansing, Michigan 48912, USA (Nofs).