In this Jan. 21, 2015 photo, kangaroo keeper Kayce Hackett, left, holds Trooper, a red kangaroo, as Capt. Eric Zuniga, an Army veterinarian from Fort Campbell, examines the animal at the Nashville Zoo in Nashville, Tenn. In order to be ready for whatever is thrown at them while deployed or at home, Fort Campbell veterinarians and techs are improving their skills by going on rounds at the Nashville Zoo. (AP Photo/Mark Humphrey) 
In this Jan. 21, 2015 photo, Capt. Eric Zuniga, an Army veterinarian from Fort Campbell, moves Fezzik, a Flemish Giant rabbit, before examining the rabbit’s inflamed ear at the Nashville Zoo in Nashville, Tenn. In order to be ready for whatever is thrown at them while deployed or at home, Fort Campbell veterinarians and techs are improving their skills by going on rounds at the Nashville Zoo. (AP Photo/Mark Humphrey) 
In this Jan. 21, 2015 photo, Capt. Eric Zuniga, an Army veterinarian from Fort Campbell, administers anesthetic to Fezzik, a Flemish Giant rabbit, before examining the rabbit’s inflamed ear at the Nashville Zoo in Nashville, Tenn. In order to be ready for whatever is thrown at them while deployed or at home, Fort Campbell veterinarians and techs are improving their skills by going on rounds at the Nashville Zoo. (AP Photo/Mark Humphrey) 
In this Jan. 21, 2015 photo, Capt. Eric Zuniga, an Army veterinarian from Fort Campbell, uses an air pistol to give vaccinations to Bongo, a springbok, at the Nashville Zoo in Nashville, Tenn. In order to be ready for whatever is thrown at them while deployed or at home, Fort Campbell veterinarians and techs are improving their skills by going on rounds at the Nashville Zoo. (AP Photo/Mark Humphrey) 
In this Jan. 21, 2015 photo, Capt. Eric Zuniga, an Army veterinarian from Fort Campbell, left, watches as associate veterinarian Dr. Margarita Woc Colburn, second from left, checks on Ted, a springbok, at the Nashville Zoo in Nashville, Tenn. In order to be ready for whatever is thrown at them while deployed or at home, Fort Campbell veterinarians and techs are improving their skills by going on rounds at the Nashville Zoo. (AP Photo/Mark Humphrey)
