Dr. Sells is a native of Central Texas; he received his first B.S. degree from Sul Ross State University in Range Animal Science in 1976. He received a second B.S. Degree in Veterinary Science in 1978 and his D.V.M. from Texas A & M Univeristy in 1980. He has been married to his wife Carolyn for 30 years and they have 4 children. They are continuing the Aggie Tradition. Stephanie, class of 2004, received her B.S. in education and is presently teaching at Bandera Middle School. Colton, class of 2007, and Carter, class of 2010, are currently attending TAMU. Shevawn, the youngest, is a junior at Bandera High School.

Dr. Sells practiced in Burnet, Texas for two years before settling in Bandera in 1982. He was a mixed practice owner for 20 years before finally limiting his practice to primarily equine and exotic wildlife.

His personal interests include ranching, hunting and restoring vintage motorcycles and trucks.