Our animal hospital vets in Baton Rouge

Our Veterinarians

The Jefferson Animal Hospital team of skilled veterinarians welcomes you to our practice. Proudly serving the Baton Rouge area. At Jefferson Animal Hospital, it is our daily privilege to provide quality vet care to your cherished pet, with compassion and competence. We hope to ensure a positive impact on our patients, pet owners and the local community.

Doctors of Veterinary Medicine

Dr. Haase, DVM

Dr. Haase at Baton Rouge Animal Hospital

Dr. Haase, DVM

Dr. Sam Haase was born and raised in Baton Rouge, Louisiana. He attended Louisiana State University from 1962-1964, received his Bachelor of Science in Veterinary Science in 1966 from Texas A & M and his Doctor of Veterinary Medicine in 1967 from Texas A & M. Dr. Haase partnered with Dr. Michaelson to build and open Jefferson Animal Hospital in 1979.Dr. Haase is a member the American Veterinary Medical Association, The Louisiana Veterinary Medical Association, and the Baton Rouge Area Veterinary Medical Association. He was awarded the Veterinarian of the Year award in 1997. He has a special interest in establishing a family relationship with clients and their pets. He also enjoys having a collegial relationship with his veterinary colleagues.

Dr. Haase is a member of the Capital Sertoma Club, a member of the Uplifted Board of Directors, and serves on the board to organize the Hall of Fashion Ball. He attends Broadmoor Presbyterian church where he is on the session board, a choir member, teaches Sunday school, is part of the hospitality ministry, and is involved with the tutoring ministry.

Dr. Haase enjoys traveling, going to the health club, walking in his neighborhood, cooking on the grill, fishing, duck hunting, & sports. He also enjoys bird watching & feeding birds in his yard year round. He is a member of a supper club, a bridge club and supports Ducks Unlimited, Delta Waterfowl, Nature Conservancy, and the Louisiana Wildlife Federation.

Dr. Haase resides in Baton Rouge with his wife, Carol, their black Labrador Annie, and Golden Retriever Daisy. They have two children, Bren and Lynn and enjoy attending school and sports activities of their four grandchildren Kate, Erin, Sam, and Jake.

Dr. Michaelson, DVM

Dr. Michaelson at Jefferson Animal Hospital animal hospital

Dr. Michaelson, DVM

Dr. Frederic Michaelson grew up in Foley, Alabama. He completed his under graduate studies at Louisiana State University from 1965 to 1969.  He was a starting defensive tackle for LSU during the 1967-1968-1969 seasons.  Dr. Michaelson received his Doctor of Veterinary Medicine from Auburn University in 1974. During his last two years of veterinary school Dr. Michaelson served as President of the student chapter of the AVMA and established the first student book store for the Veterinary School. He served in the United States Army Veterinary Corp from 1974 to 1976.  Upon discharge he returned to Baton Rouge where he was an Instructor at the Louisiana State University School of Veterinary Medicine. Dr. Michaelson partnered with Dr. Haase to build and open Jefferson Animal Hospital in 1979.

Dr. Michaelson is a member of the American Veterinary Medical Association, The Louisiana Veterinary Medical Association, and the Baton Rouge Area Veterinary Medical Association.  Dr. Michaelson has a special interest in orthopedic surgery.

Dr. Michaelson attends Christ Covenant Church, and serves on the board of The Mission Foundation, The Gathering of Men and is a founding board member of the Dunham School.  He enjoys spending time with his family, fishing, camping, motorcycling, swimming, & kayaking.

Dr. Michaelson resides with his wife, Jodi, their black lab Raven, and miniature Schnauzer Gabrielle in Baton Rouge. He has four children, Patrick, Molly, Caleb, & Seth, and seven grandchildren, Knox, Mac, Elise, Annie, Margaret, Evelyn Rose, and Kate Collins.

Dr. Thomas, DVM

Dr. Thomas at Jefferson Animal Hospital Animal Hospital

Dr. Thomas, DVM

Dr. Stephanie Thomas grew up in Baton Rouge, Louisiana, and was the salutatorian of the second graduating class from Christian Life Academy. She began her college career at Louisiana State University but took a hiatus before graduating to raise her children. After establishing her children with a good foundation she returned to LSU to become a member of the LSU School of Veterinary Medicine Class of 2013. As a non-traditional student people would hear her classmates often refer to her affectionately as “Mama Steph” around campus. This was especially true in the equine hospital, where she spent much of her time. Dr. Thomas has always had a love of animals but was drawn to veterinary medicine after volunteering with the LSU SVM faculty and students for the equine rescue effort at Lamar Dixon following Hurricane Katrina. Dr. Thomas prefers the clinical side of practice where she is able to work with her clients on a daily basis to ensure an optimum quality of life for their furry family members. Dr. Thomas is a member of the American Veterinary Medical Association, Louisiana Veterinary Medical Association, and Baton Rouge Veterinary Medical Association.

Dr. Thomas currently resides in Denham Springs with her husband, Derrel, in a house that seems to grow quieter by the year with only one of her five children still living at home. Now home has become a farm and is filled with animals including but not limited to eight chickens, four goats, three birds, two cats, one horse, one miniature donkey and one dog,lacking only the proverbial partridge in a pear tree.

In her extremely limited spare time, Dr. Stephanie enjoys motorcycle riding, horseback riding, and scuba diving. She also enjoys traveling and has combined that with her other hobbies at various destinations including England, France, Australia, Isla Roatan, Philippines, Mexico, and New Zealand. Dr. Stephanie’s favorite pastime by far is spending time with her only granddaughter, Casey Ann, who knows Dr. Stephanie as "Emme" and Derrel as "Grumps."

Certified Veterinary Acupuncturists

Dr. Bonaventure, DVM, CVA

Dr. Bonaventure at Jefferson Animal Hospital

Dr. Bonaventure, DVM, CVA

Dr. Kim Bonaventure grew up in Lake Charles, Louisiana. She completed her undergraduate studies at LSU in 1996, received her Doctor of Veterinary Medicine degree from LSU SVM in 2001, and her Certification in Veterinary Acupuncture from the Chi Institute in Reddick, Florida in 2015. Dr. Bonaventure is currently enrolled at the Chi Institute in the Chinese Herbal Therapy program. Dr. Bonaventure is a member of the American Veterinary Medical Association, the Baton Rouge Area Veterinary Medical Association, and the American Association of Traditional Chinese Veterinary Medicine.

Dr. Bonaventure and her husband David reside in New Roads with their 3 children Andrew, Kate, and Emily, and their yellow lab Girlfriend, their cat Pearl, and guinea pig Sarah Bacon. Both Dr. Bonaventure and her husband are actively involved in their children's many extracurricular activities. She is a coach for Girls on the Run, Girl Scout Leader for both of the girls' troops, and is Advancement Coordinator for her son's Boy Scout patrol. Her husband is involved as a coach for the numerous sports teams. They are members of St Mary of False River Catholic Church.

Dr Bonaventure has many small hobbies, but mostly enjoys spending time with family and friends, running, and YOLO boarding.

Dr. McCaskill, DVM, CVA, CVCH

Dr. Mccaskill at Jefferson Animal Hospital animal hospital

Dr. McCaskill, DVM, CVA, CVCH

Dr. Larry grew up in the rural community of Central located on the outskirts of Baton Rouge. He attended LSU on a Football Scholarship where he received two varsity letters. He completed his undergraduate degree from LSU and commissioned a 2nd Lt.in the USAF thru ROTC in January 1970.  He became a USAF Fighter Pilot serving on active duty until August of 1977, in which he then entered the LSU School Veterinary Medicine.

He graduated from veterinary school in May of 1981 and opened McCaskill Veterinary Hospital, a mixed animal practice, in New Roads, LA, in August 1981.  While in veterinary school he joined the USAF Reserves continuing his flying career on a part-time basis.  In September of 1991, became a United Airlines Pilot, while still maintaining his veterinary practice. He retired from the USAFR in December 1994 and United Airlines in December 2007.  Dr. Larry maintained dual careers as a practicing veterinarian and pilot for 29 years.

His interest in and study of Integrative/ Traditional Chinese Veterinary (TCVM) began at the Chi Institute of Traditional Chinese Medicine, Reddick FL, in July of 2008.  He became a CVA in March 2009. To continue his training in TCVM, he completed an International Course on Veterinary Acupuncture at the Nanjing Shihuang Institute of Animal Science and Technology, Nanjing, China in May 2009.

Dr. Larry opened the Jefferson Animal Hospital Integrative/ TCVM Small Animal Referral Practice l in the summer of 2009.He is now also a CVCH and has completed his training in Food Therapy.

He loves to promote TCVM and mentor students learning veterinary acupuncture. He has given TCVM presentations locally and internationally. He is an Internationally Chi Institute Instructor, teaching acupuncture to international students at the College of Veterinary Medicine South China Agricultural University Guang-zhou, China.

Dr.Larry resides in Oscar, LA, on False River with his wife, Lu and their Yellow Lab Cakki.  They have two children Matt and Megan and five grandchildren.  They are active members of St Mary’s Catholic Church, New Roads, LA. His favorite hobbies are working out, dove and duck hunting with his dog Cakki.