circa 1955: Dr J Y Henderson, veterinary surgeon for Ringling Bros and Barnum and Bailey Circus, stroking the neck of a panther after giving the animal a vitamin pill. (Photo by Orlando /Three Lions/Getty Images)
circa 1955: Dr J Y Henderson, veterinary surgeon for Ringling Bros and Barnum and Bailey Circus, stroking the neck of a panther after giving the animal a vitamin pill. (Photo by Orlando /Three Lions/Getty Images)