Our Practice

At Cross Timbers Animal Medical Center we believe in providing up-to-date medical care with compassion to pets and their people... because pets are family, too! We are passionately dedicated to achieving excellence in this goal for each and every animal companion entrusted to our care. We make these promises as if your pet were our own because we understand the special bond that you share. In addition to treating each special patient with the highest level of medical standards and compassion, Cross Timbers Animal Medical Center has an in-house pharmacy, extensive on-site laboratory, radiology, and surgical facilities, allowing our clients to make one stop for their pet's medical care. We look forward to meeting you and your beloved animal companion, and enjoying many happy, healthy years with you in our family!

  • Dr. John Harvey


    Dr. Harvey was born in Metairie, Louisiana. He received his degree from the University of Florida College of Veterinary Medicine in 1998. Dr. Harvey began his veterinary career in the U.S. Army, serving as Chief Veterinarian at Redstone Arsenal in Huntsville, Alabama. He then joined a small animal hospital in 2001, serving as Associate Veterinarian, in Lake Mary, Florida.

    Dr. Harvey and his wife, Christine, excitedly discovered beautiful Flower Mound after a long search. They purchased Cross Timbers Animal Medical Center (formerly Aladdin Animal Hospital) to realize Dr. Harvey’s dream of practice ownership. Each and every day, the primary goal of Dr. Harvey and his staff at CT-AMC is to provide the most personalized and highest quality health care to each pet in our animal hospital family!

    In addition to the practice, Flower Mound is exactly the community that the Harveys were seeking to put down strong family roots for years to come. Dr. Harvey and Christine have three children. There have been many pet family members through the years; including, beloved Rogue and Smokey, the couple’s college cats; sweet Casey Dog, a black and tan coonhound adopted from Redstone in Alabama; and many rescue animals that completed the family.

    Currently, the family is blessed with lots of unconditional love from O’hana, a sweet and beautiful mixed breed dog from Coppell Humane Society, and Daphne, an amazing Pyrenees dog and true companion to O’hana and the Harvey family, from SPIN (Saving Pyrs in Need).

    When not taking care of our furry friends at Cross Timbers AMC, Dr. Harvey enjoys spending time with his family, golfing, hiking, reading and college football (Go Gators!). Dr. Harvey is also active in the community in the following ways:
    On Board of Directors, Flower Mound Animal Control
    On Board of Directors, Flower Mound Emergency Pet Hospital
    Member, American Veterinary Medical Association
    Member, Texas Veterinary Medical Association
    Den Leader for his son’s Cub Scout Pack
    Committee Chairman for the Cub Scout Pack
    Active Member of the WATCH D.O.G.S Program at Heritage Elementary and McAuliffe Elementary where his children attend school

  • Dr. Dena Hartley-Lock


    Dr. Lock was born in Minnesota, and while growing up, lived in Michigan, Wisconsin, Nevada, Texas and Tennessee.  She received her degree from the University of Tennessee in 2002.  This is where her love of college football and most importantly, the Tennessee Volunteers began.

    Another love became apparent at the University of Tennessee. Feline Medicine.  After graduation, she worked for 2 years with a nationally recognized feline practitioner in San Antonio, Texas, prior to joining Cross Timbers AMC in 2005.  She truly enjoys that this has allowed the diversity of getting to work with dogs, in addition to being able to continue her passionate care for cats.  She is working toward becoming ABVP (American Board of Veterinary Practitioners) certified in feline medicine in the future.  She is a USDA accredited  veterinarian and has experience in and enjoys the challenges of helping clients who are traveling or moving overseas with their pets.

    Travel is another love of Dr.Lock’s.  Her husband, Bevin is from the beautiful country of New Zealand and they try to get home to visit their family as often as possible.  Dr. Lock is blessed that they have her immediate family here locally.  She and her husband, along with their dog Peyton (yes, after Peyton Manning) and their many beloved felines enjoy living in the Highland Village community. She enjoys working with patients, clients and the staff, all of whom she considers her extended family at Cross Timbers AMC.

    Member, American Association of Feline Practitioners

    Member, American Veterinary Medical Association

    Member, Texas Veterinary Medical Association

  • Dr. Al Arca


    Dr. Al Arca has been with Cross Timbers Animal Medical Center since 2016 as a relief veterinarian.  He graduated with his Doctorate in Veterinary Medicine in 1988 from Texas A&M University.  Dr. Arca has been working as a relief veterinarian in the DFW area for over 14 years!  We are proud to have him with us on most Tuesdays throughout the year and on some Saturdays as his schedule allows.

    Dr. Arca is married to Dr. Sandra Arca, a pediatrician with Cook’s Children Network.  They have three amazing daughters who are following in their parents’ footsteps attending school at Texas A&M University.  The Arca Family includes 2 dogs and 2 cats.  When Dr. Arca is not taking care of his patients, he enjoys jogging, genealogy, reading and keeping up with his kids and furry friends.

  • Evangeline

    Practice Manager

    Evangeline joined our team in August of 2012 and is our clinic’s Office Manager. She graduated from the University of Georgia in 1993 and obtained her Bachelor’s in Business Administration.  Though she is fond of all furry friends, she has a special love for dachshunds.  She enjoys spending her free time with her husband and three children.

  • Leslie

    Reception Manager

    Leslie is our Reception Manager.  She started with the clinic in March of 2014.  Leslie has over 20 years of experience in the veterinary field.  Her four adorable Pugs and her lovable Chiweenie are her current passion.  She enjoys doing rescue and helping pets in need. Her family and church are extremely important to her.

  • Audrey


    Audrey became one of our amazing receptionists in October of 2017.  She is originally from Chicago, Illinois.  Audrey has a wonderful husband and son.  She has over 3 years of experience in the veterinary field. Audrey enjoys spending time with her family, cooking, and painting.  She also loves spending time with her 4 dogs, Annie, Baby Gill, Lotso, Tebow.

  • Heather

    Technician Manager

    Heather joined Cross Timber Animal Medical Center in 2006 and is our expert Veterinary Technician Manager. Heather has been in the Veterinary field for over 14 years and enjoys taking exceptional care of all the patients that are a part of the Cross Timbers family. She is currently going to school to become a Licensed Veterinary Technician.

  • Bridget

    Registered Veterinary Technician

    Bridget McGraw has been with us since December of 2015. She brings almost 10 years of experience with her and we are lucky to have her! She graduated from and received her RVT from the renowned Bel-Rea Veterinary Technician Training Program in Denver, Colorado in 2010. She is originally from the Chicago area and moved to Texas in 2007. Bridget has 5 dogs: Sophie, Izzy, Cosmo, Bella and Hester as well as a parakeet named Sunny. Outside of work, Bridget loves to read and watch TV. She likes going on long walks with her dogs. She has also found baking to be therapeutic.

  • Laura


    Laura has been with our clinic since June of 2015.  She started off as a kennel assistant and has quickly moved up to a technician position. Laura is also enrolled in the Cedar Valley Vet Tech program and is absorbing every bit of knowledge and task thrown her way! She is from in Lewisville, Texas. Laura and her family are very involved in rescuing pets.  They have 16 adorable pets.

  • Jacob

    Kennel Assistant

    Jacob has worked in our kennel helping care for our patients for almost a year. He is originally from Lewisville, Texas and graduated from Marcus High School. Jacob has 5 dogs named Geronimo, Dade, Violet, Smooch and Bella. Outside of work Jacob enjoys hunting, fishing and playing with his dogs. His favorite part of his job is taking care of the animals.

  • O’hana & Big Dog Daphne

    Cross Timbers AMC Family Dogs

    O’hana and Big Dog are the Cross Timbers AMC adopted family dogs.  They live with the Harvey family, happy to have found a forever home where they chase squirrels and geckos to their heart’s content.  In addition to bringing joy to the Harveys, they love occasionally visiting their Cross Timbers family for Doggie Camp where they’re showered with lots of TLC.

    O’hana’s specialty is chasing full speed after tennis balls and bathing loved ones in kisses. She joined the Cross Timbers AMC family in July, 2008.

    Daphne’s specialty is being O’hana’s Best Friend and giving lots of love to the Harveys.  She’s especially watchful over the kiddos, which they love!  Daphne is affectionately called “Big Dog” for obvious reasons, but this nickname also describes the big love in this sweet girl’s heart.

    On a personal note, O’hana means “Family” in Hawaiian.  Her name was suggested by then five-year-old Christopher, while a big fan of Disney’s Lilo & Stitch.  When O’hana was adopted, he said, “Her name means family, and family means no one gets left behind.”

    Cross Timbers Animal Medical Center asks you to responsibly consider adopting or fostering if there is a little extra space under your roof for a lot more love from an animal companion.  We think you’ll find the rewards are never ending.  It’s one way you can help make the world a better place, by making the life of an animal a happier one.