Deerfield Animal Hospital

Our Staff



Veterinarian(s)

  • Peter M. Hey , DVM


    Dr. Pete Hey grew up on a ranch in Mason, Texas working cattle and goats. Dr. Hey then went on to College Station where he earned his DVM from the Texas A&M College of Veterinary Medicine in 1989. He met his wife, Maria, just as he was headed out the door to graduate.  They were married in 1991 just a few months before Dr. Maria graduated with her DVM. They have three beautiful children, Gabriel, Malachi, and Hannah.  When not providing dedicated surgical and medical care for his patients, Dr. Hey spends most of his time off with his family. He loves the beach and also enjoys getting back home to the ranch when he can.  If Dr. Hey isn't at baseball or driving a child to swim practice, he is searching for cool old cars or preparing something mouth watering on the grill.  The Hey family has an array of pets as seen in Dr. Maria Hey's bio.
  • Jennifer A. Halberg , DVM


    Dr. Halberg was born in Houston, Texas and moved to San Antonio in the early 80's. She attended Clark High School, Mary Baldwin College for her undergrad, and Texas A&M University for her doctorate of veterinary medicine.
    Her interests include working out and staying physically fit, reading, listening to music, and going to concerts and musicals. She is married and has a 7 year old daughter, a labrador retriever named Jager, a mixed breed named Madchen, and a domestic short hair named Tigger. Dr. Halberg has been with the Deerfield family since 2007.
  • Anne M Faseler , DVM


    Dr. Faseler was born in McAllen, Tx; moved around until she was 6 yrs old because her father was in the Army.  She grew up in Plano, Tx  for 29yrs, then moved to San Antonio area in December of 2004.  Dr. Faseler attented Texas A&M University for her bachelors in Veterinary Science and received her doctorate of veterinary medicine in 1994.  She is a full-time mother/wife! She has been married to Steve Faseler for over 20 years and they have 4 beautiful daughters that keep her very busy.  She enjoys being involved in her daughter's activities including band, athletics, and 4H. She loves wathcing football and is active in the church and women's ministries. Sadly, all this leaves little time for scrapbooking. The Faseler family have two german short-haired pointers named Wesley and Hunter, a miniature schnauzer named Dolly, a cat name Skye, two rabbits named Precious and Spot, a dumbo rat named Indy, and two amazon river frogs named Shrek and Baby. 
  • Stacey S. Kronewetter



Management Staff

  • Maria T. Hey, DVM , Practice Manager/Veterinarian


    Dr. Maria Hey grew up in Amarillo, Texas where her love of animals began. She then headed off to College Station, where she earned her bachelors degree in biochemistry and her DVM from the Texas A&M College of Veterinary Medicine.  It is there where she met her husband, Dr. Pete Hey.  They were married in 1991, just a few months before her graduation.  They now have three beautiful children, Gabriel, Malachai, and Hannah.  Dr. Maria Hey also has a passion for photography, as you will quickly notice just by stepping into Deerfield Animal Hospital's doors.  In addition to her positions as Practice Manager and Mom, she runs a small part-time photography busniess, Maria Hey Photography.  The Hey family has a number of pets including three cats (Angel, C.C. and Pirate), three dogs (Scamp, Scooby, and Woody), a horse named Pudge and a turtle named Heraldo.  You can meet C.C. when you walk in the doors at Deerfield; she is our infamous "greeter".
  • Alana M. Landrum , Office Manager


    Alana was born and raised in McAllen, Texas where upon graduating from Memorial High School moved to San Antonio to attend the University of Texas. She graduated with a bachelors degree in Business Management. Her interests include horse show jumping and spending time with her family and friends. She has two beautiful daughters, Jenna is 14 years and Kendyll is 2 1/2 yrs old. She has a pembroke welsh corgi named Kayli.
  • Leah Mackrell , Administrative Assistant



Technician Staff

  • Tiffany


    Tiffany is 24 years old and has lived in San Antonio her entire life.  She has 2 cats named Marc Anthony and Cleopatra.  When she is not studying or working, she enjoys cooking, arts and crafts, and going to the beach as often as possible. Her goals are to be a Veterinary Technciian and even maybe a Veterinarian one day.
  • Chelsea Rea



  • Jennie


    Jennie just moved to the San Antonio area in January of 2013. She has 2 dogs, one female catahoula leopard and one male burmese mountain dog mix.  They are her babies!!  She loves being outdoors and enjoys hiking, running, the beach and going to the dog park.  She has started to pursue her Veterinary Technician certification through Broadview University and will be attending Palo Alto College to finish. She aspires to specialize in exotics and one day work in a wildlife rehabilitation center.
  • Amanda , Registered Vet Technician


    Amanda was born and raised in San Antonio, Texas. She received her veterinary technician license from Palo Alto College and her bachelors in management from the University of Phoenix. Her interests include scrapbooking and jewelry making. She has two chow mixes named Casey and Shadow, a DSH named Pilgrim, and a Siamese Mix named Mr. Nibbles. Amanda also now has a very hyper Boxer named Phoenix.  She got married on October 7, 2006. She has been a part of the Deerfield family since 2004.
  • Nancy , Technician


    Nancy was born and raised in Plano, Texas. She moved to McAllen, Texas in 1994 for 6 years and has lived in San Antonio for the past 5 years. She attended the University of Texas at Austin and received her bachelor of science degree in Zoology in 2006. Her interests include swimming, being outside in the sun, reading books and drinking Starbucks.  She loves food and has a very bad sweet tooth. She has two cats: Blue, her "laid back" cool cat, and Luna, her "miss priss-don't touch me" cat. She has been a part of the Deerfield family since 2006.
  • Erin


    Erin grew up in San Antonio. She enjoys jogging, horse racing, shopping, and being with her family.  She has 2 dogs named Georgia and Bailey and 2 cats named Biggie and Jack.  She got married in Augus of 2011 and have a beautiful daughter named Kyndal.
  • Melissa



  • Erika



Reception Staff

  • Lisa , Head Receptionist


    Lisa was born and raised in San Antonio, Texas. She enjoys baking and scrapbooking. She has a Chihuahua named Jersey and three cats named Tieken, Cayu and Kasper. Lisa and a baby girl named Jordyn on June 28, 2011. Her new collection consists of many Winnie the Pooh items, especially Eeyore, for the baby.  Lisa has been with the Deerfield family since 2003.
  • Chelsey


    Chelsey was born and raised in McAllen, Texas where she graduated from McAllen Memorial High School. She is currently studying to become a teacher. Her interests include baking, listening to music, traveling, dancing, watching movies, and shopping. She has a 7 year old pomeranian mix named Zeke, a 2 year mixed named Zarina, and a cat named Rich Kitty. She is getting married Oct 8, 2011 in McAllen, Tx. She loves spending time with her family and her favorite color is pink.  Chelsey has been with the Deerfield family since 2008.
Kennel Staff

  • David


    David was born in Wittlich, Germany. he moved to San Antonio when he was about 4 years old. He graduated from James Madison High School in 2008. His interests include hiking, photography, skateboarding, music and art. He has two dogs named Maus and Peggy and two Sugar Gliders named Momo and Hyde.


Pet Portals