Thomas Mac Devin was born in Canyon, Texas to Delbert Lee Devin and Elizabeth Louise (Betty) McMurtry. He grew-up in Tulia and earned a BS from Texas Tech, a second BS from A&M, and his DVM at Texas A&M. He married Karla McCain on 22 April 1978 and they had four children;

1) Noel Devin 1981-2014
2) Thomas Nickless McCain Devin 1983-2010
3) James Nelson McMurtry Devin 1991-
4) Kenneth Neil McCaulley Devin 1993-

After a funeral service Tuesday April 15 at Central Baptist Church, College Station and another service in Gainesville, Cooke, Texas on Wed April 16, 2014 both Thomas Mac Devin and his daughter Noel Devin will be interred at Fairview Cemetery in Gainesville's Fairview Cemetery.

Funeral services for Mac Devin, (63), of Bryan, Texas are set for Tuesday, April 15 at 2 pm at Central Baptist Church. A second funeral service will be held on Wednesday, April 16 at 2 pm at the Geo. J. Carroll & Son Funeral Home in Gainesville. Burial will follow in Gainesville. Both are under the direction of Jonathan Brooks.

Survivors include his wife Karla McCain Devin of College Station, his mother Betty Devin of Tulia, his brother and sister in law Lee & Tracy Devin of Vigo Park, his sons Nelson Devin and Neil Devin, his father-in-law Horace McCain of Gainesville, Roy T. & Ireta Janiec of Bend, Oregon and Bob McDaniel, Gainesville. Mac is also survived by uncles, aunts, cousins and countless friends. Mac was preceded in death by his father, Delbert L. Devin, his son Thomas Nickless McCain Devin, and his daughter Noel Devin.

Mac was raised on a diversified, irrigated farm and ranching operation in the Texas Panhandle. He was a graduate of the class of 1969 from Tulia High School in Tulia, Texas as valedictorian. He earned the highest rank in Future Farmers of America by receiving the Lone Star Farmer and American Farmer Degrees. He graduated with a B.S. in Agronomy from Texas Tech in 1973. After graduation he returned to the family farming operation, working in a family partnership from 1973 until 1985. In 1985, Mac was admitted to the Texas A&M College of Veterinary Medicine, and received his B.S. in 1987 and his DVM in 1989. For the next few years he enjoyed general veterinary practice including extensive cattle herd health, feedlot and equine work in Beaumont, Frisco and Clarendon. In 1997, he entered industrial practice supporting livestock and equine products for Fort Dodge Animal Health and in 2009 joined Boehringer-Ingelheim as a Professional Services Veterinarian, supporting the Southwestern Region.

Mac was a member of Restoration Church in Bryan.
Mac was a member of the Academy of Veterinary Consultants, Texas Southwest Cattle Raisers Association and American Associate of Bovine Practitioners. He was universally loved by his colleagues and friends for the devotion he showed both in life and work. His colleagues noted he started all his meetings with the same joke, "Do you know the difference between a fairy tale and a cowboy story?" The fairy tale starts with, "Once upon a time", and the cowboy story starts with, "No kidding this really happened". He was a very caring individual always showing more concern for his colleagues and friends and their families than himself. He was always open for discussion, no matter the situation, lending an ear. He was the "Mother Hen" and the "Guardian of the Southern Region".

In lieu of flowers the family requests that all gifts be directed to the Thomas Mac Devin DVM '89 Memorial Scholarship. Checks should be made payable to the Texas A&M Foundation and sent to the Thomas Mac Devin DVM '89 Memorial Scholarship, c/o the Dean's Office, College of Veterinary Medicine, 4461 TAMU, College Station, TX 77843-4461.
Pallbearers will be, David Celella DVM '89, Johnny Cooper, Dr. Galen Green ‘04, Dr. Jody Wade, Earl Hartman, Kevin Johnson, Brian Miller DVM, Paul Patton DVM '89, Scott Porter and Jerry Woodruff DVM.

Honorary pallbearers will be the Class of '89 Texas A&M Veterinary School, Boehringer-Ingelheim colleagues and all colleagues from the Ft. Dodge Professional Services Division.

A candlelight vigil has been planned to remember Mac and Noel on Saturday, April 12 at 8 p.m. in the Zone Plaza, which is located between the Memorial Student Center and Kyle Field on the campus of Texas A&M University. Candles for the vigil will be provided and distributed by the Texas A&M Student Athlete Advisory Council (SAAC). The 12th Man Foundation offices will be open to all those who attend the vigil afterward for fellowship and refreshments. Parking is free on the west side of Kyle Field off Wellborn Road.