Meet Our Doctors

  • Dr.
    Ron Weich

    Dr. Ron Weich is a 1994 graduate of Ross University and joined the practice in 1995; he has been owner since 2010.  His areas of interest include: ophthalmology, internal medicine, and soft tissue surgery. He is a private pilot, and enjoys motorcycle touring, as well as spending time with his family.

  • Dr.
    Misty Callaham-Solis

    Dr. Misty Callaham attended undergraduate and veterinary school at Texas A&M University. She joined the Crossroads Animal Hospital team in 2002, and became Dr. Weich’s business partner in 2015.  Her interests include soft tissue surgery, orthopedic surgeries, and cardiology. Misty enjoys running, skiing, and spending time with her family.

  • Dr.
    James Koschmann

    Dr. James Koschmann is a Wisconsin native and graduated from Texas A&M University in 1977. He is the founding owner of Crossroads Animal Hospital and semi retired now. His areas of interest include: orthopedic and soft tissue surgeries. He enjoys carving duck decoys, photography, and spending time with his family and animals.

  • Dr.
    Mark Lenox

    Dr. Mark Lenox is from Dallas, Texas and graduated from Texas A&M University in 1984. His areas of interest are soft tissue surgeries and exotic animals. He enjoys photography, golf, training for triathlons and spending time with his dog Buster.

  • Dr.
    Sharon Joslin-Ortiz

    Dr. Sharon Joslin-Ortiz grew up in a military family and traveled all over the world. She graduated from Texas A&M University in 1989. Her area of interest is internal medicine. She's an avid swimmer, enjoys spending time with her family, and is very committed to studying the bible.

  • Dr.
    Margie Zavala-Osburn

    Dr. Margie Zavala, a native El Pasoan, graduated from Texas A&M University in 1997 and joined the practice in 1999. Her interests include: dermatology and internal medicine. Her hobbies are reading non-fiction, cooking and spending time with her husband, two sons and daughter.

  • Victoria Barnett

    Dr. Victoria Barnett is originally from Oklahoma and attended Oklahoma State University. She joined Crossroads in 2018. Her interests include internal medicine, soft tissue surgery and wound management. Victoria enjoys traveling, reading, hiking, and spending time with family, especially with her husband David and all their fur babies.


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Office Hours

Our Regular Schedule

Crossroads Animal Hospital


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-2:00 pm




  • "My dog and I loved it here!!! She actually was very relaxed the whole time! The staff an doctor were amazing!!! I'm bringing my other doggy as well!!!!"
    Adyan Graziani