Gordon Lee Calahan was born in August 1956 in Ruston, Louisiana, but grew up in El Dorado, Arkansas.  He graduated from El Dorado High School in 1974.  He then did his undergraduate at Louisiana Tech where he received a Bachelor in Animal Science.  After graduating from Louisiana State University School of Veterinary Medicine in 1981, he worked at Westside Animal Hospital for four years.  Dr. Calahan established South Shreveport Animal Hospital in 1985.

Dr. Calahan often says, "For as long as I can remember, I have always wanted to take care of animals."  He started working for a veterinarian while in high school and says that, "I have always felt that this occupation was my calling. I truly believe that this is what God wants me to do."  Dr. Calahan's wife works with him and is the Office Manager at the hospital.  Gordon and Kristi got married in November 1999 and they have three daughters - Madison, Meredith and Maura.  Dr. Calahan has a son named Blaine that is a graduate from Louisiana Tech.  At home they have two Boxers - "MAC" and "Abbie".  They also have three small dogs - "Copper" and "Macey" are Cavalier King Charles Spaniels and "Chance" is a rat terrier. We also have a 400-gallon salt-water aquarium with many fish, marine plants and animals.

Dr. Calahan is a member of the American Veterinary Medical Association, the Louisiana Veterinary Medical Association, and was a past president and member of both the Northwest Louisiana Veterinary Association and the local Animal Emergency Clinic.