Bay City Veterinary Clinic & Equine Hospital

4501 7th St.

Bay City, TX 77414



Contact Us


  • Dr.
    Randy Volkmer

    Dr. Randy Volkmer was born on August 14th, 1964 in Fort Hood, Texas. He is a 1982 graduate of Bay City High School. He followed his high school years with nine years of college seven of those nine years were at Texas A&M in College Station. In 1987 he married the love of his life Lisa Piwonka. They have two boys, Randy II and Karson. Both are third generation to attend Bay City High School and both attended Texas A&M in College Station, Texas. In July 2016 one will start medical school and the other is finishing his engineering degree and will attend law school post graduation.

    He has two Bachelor of Science degrees from Texas A&M and received his Doctorate of Veterinary Medicine in 1991. Dr. Volkmer began his professional career in his hometown of Bay City at Bay City Veterinary Clinic & Equine Hospital and has been there ever since.

    Dr. Volkmer is a past and present member of various community and professional organizations. Some of the professional are: Texas Veterinary Medical Association, American Veterinary Medical Association, American Association of Equine Practitioners, and the Texas Equine Veterinary Association. Some of the community are: Bay City Independent School District Board of Trustees, American Red Cross, Women’s Crisis Center, Rotary, Matagorda County Fair Board, Little League Board and Coach, and the Matagorda County A&M Club.

    Like all of the doctors at Bay City Veterinary Clinic & Equine Hospital, he has the same vision for quality care and treatment of his patients. He will continue to strive to offer the latest advancements in Veterinary Medicine by having state of the art facilities, equipment, and a highly trained and motivated staff.

  • Dr.
    Joshua Shield

    Dr. Joshua Savage Shield grew up in Bay City, TX. He graduated from Bay City High School in 2002. He studied Biomedical Science at Texas A&M University and received a Bachelors of Science in 2006. May 2012 He graduated veterinary school from Texas A&M University College of Veterinary Medicine. In May of 2012, Dr. Shield joined the veterinarian team and began practicing veterinary medicine at Bay City Veterinary Clinic and Equine Hospital.

    Dr. Shield is proud of his family heritage and is the 9th generation of his family in Matagorda County. Working on his family's farm and ranch, he discovered his passion for working with large animals. He married his high school sweetheart Debra Manna in 2007. They now have two boys, Hudson and Paxton. They also have a small dog Ellie and two cats, June & July. Dr. Shield is an active member of St. Mark's Episcopal Church and is currently on the Bay City Country Club Board. Dr. Shield is a member of the Texas Veterinary Medical Association, American Veterinary Medical Association, American Association of Equine Practitioners, American Association of Bovine Practitioners, and Society For Theriogenology.

    Dr. Shield continues to strive for excellence in veterinary medicine. He prides himself on treating clients as family and every patient as if they were his own pet.

  • Dr.
    Jana Zapalac

    Dr. Jana Zapalac grew up in Needville, Texas and graduated from Needville High School in 1998. She received a Bachelors of Science degree from Texas A&M University in 2002. During her years in veterinary school, she did externships at the 6666's Ranch, Anglesy Equine Hospital in Kildare, Ireland, and Ngongoni Private Game Lodge in Nelspruit, South Africa. In June of 2009, she graduated from Ross University School of Veterinary Medicine.

    After dating for 10 years, Dr. Zapalac married Zach Zapalac in 2010 and moved to Wharton Texas. In 2013 was blessed with a son, Barrett, a sweet and rambunctious little boy and in 2015 with her beautiful, smiley daughter, Payton. Their family also includes two Kittian island dogs, Carmella and Caribelle and two cats, Brinley and Scot. Her interests include traveling, scuba diving, hunting, fishing, and crafting.

    Dr. Zapalac enjoys working on both small and large animals and joined Bay City Veterinary Clinic in November of 2015.

  • Dr.
    Bryan Sherman

    Dr. Bryan Sherman grew up here in Bay City, Texas. During his years of high school and undergraduate work, Dr. Sherman worked for Bay City Veterinary Clinic first as an assistant and later as a technician before applying to vet school. Dr. Sherman was accepted into Texas A&M Veterinary School in 2013 and worked as a technician in the small animal ICU during his time there.

    Dr. Sherman graduated with Magna Cum Laude honors from the Texas A&M College of Veterinary Medicine in May of 2017 and came home to work for Bay City Veterinary Clinic. He now resides in Bay City with his wife Ashleigh and their dogs, Dixie and Bentley and cat, Katniss.

    Dr. Sherman enjoys all aspects of mixed animal practice, but has a particular interest in surgery and orthopedics where he actively pursues continuing education. Dr. Sherman is now TPLO certified for repair of cranial cruciate disease in dogs.

  • Dr.
    Tess Crider
    Associate Veterinarian

    Bio to come

  • Dr.
    Douglas Marquardt

    Dr. Doug Marquardt grew up in Boerne, Texas. He graduated from Boerne High School in 1981. He received a Bachelors degree in Biomedical science from Texas A&M University in 1985.  He graduated from Texas A&M College of Veterinary Medicine in 1991. After graduation he moved to El Campo and has practiced there for the past 27 years.

    Dr. Marquardt met his wife DeAnne while in college at TAMU and they married in 1992. She is a teacher at St. Philips Catholic School in El Campo. They have two children, Cody and Kaitlyn, who are both currently at TAMU. Cody is finishing a degree in Ocean Engineering and plans to enter the Masters program. Kaitlyn is in her first year in Allied Health. Dr. Marquardt’s interests include golf, fishing, and Aggie sports.

    Dr. Marquardt has been in mixed animal practice for his entire career and enjoys all aspects of veterinary medicine.