Dr. Levine has been working and conducting research in animal physical rehabilitation since 1993 and is co-director of the University of Tennessee's certificate program in canine rehabilitation. He is a co-editor of multiple books, including Canine Rehabilitation and Physical Therapy, Essential Facts of Physiotherapy in Dogs and Cats, and Gait Analysis: An Introduction. He has presented at over 100 conferences, and has lectured in more than a dozen countries. Dr. Levine has published in numerous peer-reviewed journals with over 100 publications. His latest research focuses on canine rehabilitation, clinical infectious disease, animal assisted therapy, and laser to improve muscle endurance