In 1979, Denney became co-owner of Veterinary Medical Associates, Inc. She has been involved in her community in many capacities, including serving as city commission mayor and vice-mayor of Cushing, OK from 1994–2003. From 1995–2004, she served on the Board of Veterinary Medical Examiners. She is currently a member of the Oklahoma Veterinary Medical Association and the American Veterinary Medical Association.
