We believe it is our responsibility to protect, conserve and advance the inputs surrounding food animal health and production. Learn more about the people that provide quality service at Circle H Headquarters LLC.
Veterinarians
Dr. C. Scanlon Daniels, DVM, MBA
Dr. C. Scanlon Daniels, DVM, MBA was born in central Iowa where his family operated a farrow-to-finish swine operation and a cow calf herd. He graduat...
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Dr. C. Scanlon Daniels, DVM, MBA
Dr. C. Scanlon Daniels, DVM, MBA was born in central Iowa where his family operated a farrow-to-finish swine operation and a cow calf herd. He graduated from Iowa State University with a Bachelor of Science degree in Animal Science in 1997 and Doctor of Veterinary Medicine in 1998. In 2003, he graduated from the University of Guelph with a Master of Business Administration degree.
After graduation from veterinary school, Dr. Daniels accepted a production veterinarian position with Iowa Select Farms in Iowa Falls, IA where he was responsible for maintaining regulatory compliance, monitoring system health and implementing health improvement processes in a 96,000 sow integrated live hog production system.
In 1999, he accepted a veterinarian position with Seaboard Farms, Inc. During five years at Seaboard Farms in Guymon, OK, he led their Health Assurance Team consisting of seven veterinary, technical and administrative staff. That team was responsible for managing live production health for the third largest pork production company in the US. He was directly responsible for developing the animal health products budget and was a critical member of live production management team and integrated research and development group. During his time there, Dr. Daniels gained extensive experience from numerous PRRSV and Mycoplasma elimination projects.
In April of 2004, Dr. Daniels joined Dr. Angela Daniels in the recently-founded Circle H Animal Health, LLC food animal veterinary practice in Dalhart, TX.
Dr. Daniels currently resides in Dalhart, Texas with his sons Eric, Luke, Judd and Dirk. Dr. Daniels current professional interests are food animal health, food systems production management and food animal research. His involvement in professional associations and publications & presentations are listed below.
PROFESSIONAL ORGANIZATIONS
Academy of Veterinary Consultants (2004 to Present)
Advisory Board Member, Center for Swine Disease Eradication (2000 to 2004)
American Association of Industrial Veterinarians (2001 to Present)
American Association of Swine Veterinarians (1994 to Present)
American Association of Veterinary Laboratory Diagnosticians (2003 to Present)
American Veterinary Medical Association (1994 to Present)
Dalhart Chamber of Commerce (2004 to 2007)
National Pork Board Veterinary Advisory Group (2003 to Present)
PUBLICATIONS AND PRESENTATIONS
Daniels, C.S., Cowan, T.S. and Sornsen, S.A. 1997. Clinical field study to identify swine respiratory pathogens present in grow-finish pigs and assess their impact on performance. American Association of Swine Practitioners Proceedings, 237-238.
Daniels, C.S., Hoffman, L.J., Apley, M.D., and Schwartz, K.J., 1998. Antimicrobial susceptibility profiles of swine pathogens tested at the Iowa State University Veterinary Diagnostic Laboratory. American Association of Swine Practitioners Proceedings, 59-60.
Daniels, C.S., Daniels, A.M., and Karriker, L. 2003. Challenges in diagnosis and control of swine influenza virus. American Association of Swine Veterinarians Proceedings, 381-386.
Daniels, C.S., Thacker, B., Sornsen, S., and Thacker, E. 1999. Survey of Mycoplasma hyopneumoniae maternally-derived antibodies in suckling pigs. Allen D. Leman Swine Conference Recent Research Reports, 41.
Fitzsimmons, M.A. and Daniels, C.S. 2003. Control in large systems. 2003 PRRS Compendium, 137-142. J. Zimmerman, K.-J. Yoon (eds). National Pork Board, Des Moines, Iowa.
Daniels, C.S. and Fitzsimmons, M.A. 2002. PRRS control in large systems. Trends in Emerging Viral Infections of Swine, A. Morilla, K.-J. Yoon, J. Zimmerman (eds). Iowa State University Press, Ames, Iowa.
Daniels, C. S. 2003. Area spread of PRRSV from a small population of backyard pigs. American Association of Swine Veterinarians pre-conference session, Preventing and controlling PRRSV: mission impossible?
Daniels, C.S. 2003. PRRS control on large farms. The North American Veterinary Conference, 2003 Proceedings, 320.
Daniels, C.S. 2003. Prioritizing time and vet services. The North American Veterinary Conference, 2003 Proceedings, 321.
Daniels, C.S. 2003. Active monitoring of a systems health status. The North American Veterinary Conference, 2003 Proceedings, 318-319.
Daniels, C.S. 2003. The economics of depopulation & repopulation versus herd closure for control of porcine reproductive and respiratory syndrome virus and Mycoplasma hyopneumoniae in a multi-site swine production system. Masters project, University of Guelph, Ontario.
Daniels, C.S. 2001. Group-based sow record keeping. American Association of Swine Veterinarians Pre-conference Session: Making your life easier with computer information services.
Baker RB, Yu W, Fuentes M, et al. Prairie dog (Cynomys ludovicianus) is not a host for porcine reproductive and respiratory syndrome virus. J Swine Health Prod 2007;15(1):22-29.
Administrative Staff
Laboratory Staff
Melissa Sisneros
Laboratory & Veterinary Practice Manager
Melissa has been with Circle H for over ...
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Melissa Sisneros
Laboratory & Veterinary Practice Manager
Melissa has been with Circle H for over ten years and she loves how Circle H is always updating procedures. She enjoys the experience of being challenged to continue to grow and adapt both independently and as a company. With the help of Circle H, she received her dual bachelor’s in biology and chemistry from Oklahoma Panhandle State University.
Melissa grew up in Dalhart and is happy to be raising her family in the same area with her husband. Being a mother of two and a grandmother of one, she keeps herself busy outside of work. Additionally, in the family, they own three rescue dogs and a cat. Melissa says, “I love the community involvement and support that our hometown gives one another, and you know that a friend is always close by.”
Milissa Brewer
Assistant Laboratory Manager
Milissa has been with Circle H Headquarters for three years. At an early age she found a passion for animals and agricul...
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Milissa Brewer
Assistant Laboratory Manager
Milissa has been with Circle H Headquarters for three years. At an early age she found a passion for animals and agriculture as she rode horses. Each day at Circle H, she is reminded of that passion and gets the opportunity to further explore it.
Wanting to be closer to family, Milissa decided to move to Dalhart in 1997. Milissa and her husband of 33 years, Bryan, love the area they live in and love to be active in the community. They are members of the Lincoln Street Baptist Church and Dalhart Cruzers Car Club. Milissa says that her favorite part about Dalhart is that “everyone knows when someone is in need. Whether it be a prayer, help, or support, this community is here for them. I am proud to be a part of a growing supportive community.”
Together, Milissa and Bryan are the parents of two sons. Their oldest son, Justin is married and has three children. As grandparents, they love to attend ball games and tumbling and cheer competitions. The youngest son, Tyler is a welder and loves to travel. Milissa and Bryan also have a very spoiled chocolate lab, Henry Hank Ford.
Those who work with Milissa know she is a “workaholic.” She enjoys that every day is a new challenge and learning opportunity. Some of her favorite memories include getting to watch a c-section and a necropsy. She loves to learn something new each day and help teach her coworkers to see them succeed and find their passion.
Cheryl Eaton
Laboratory Technician & Driver
Cheryl has been with Circle H since 2015.
Brittany Johnson
Laboratory Technician
Brittany is originally from Dalhart, Texas and graduated from Dalhart High School. She has two brothers and one sister. Additio...
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Brittany Johnson
Laboratory Technician
Brittany is originally from Dalhart, Texas and graduated from Dalhart High School. She has two brothers and one sister. Additionally, Brittany owns a cat named Callie.
During her time with Circle H, Brittany has been able to learn various aspects of the lab and find her passion. From helping with animal diagnostics, DHIA, raw milk, and much more, she is learning all parts of the company within her time.
Because of her ability to learn and adapt quickly, Brittany has been thrown into unique circumstances and has shown her tremendous leadership skills. When asked what her favorite thing about Circle H is, she said, “No matter the circumstance we utilize what we have and make it work.”
Animal Health Staff
Kayla Griggs
Veterinary Technician, Research Manager, & DHIA Weigh Day Manager
Kayla has been with C...
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Kayla Griggs
Veterinary Technician, Research Manager, & DHIA Weigh Day Manager
Kayla has been with Circle H Headquarters for over four years. Kayla has a strong love for animals and it shows in both her personal and professional life.
Kayla grew up in Parker, Colorado and now resides in Sedan, New Mexico. Kayla and her husband, Levi Griggs, are the owners of three dogs (Lucy, Missy, and Hilda), two cats, six horses, and many head of cattle. Kayla loves the communities she lives and works in because of the people. During her time at Circle H, she has been able to create meaningful relationships with coworkers and clients that she will never take for granted.
Kayla attended Colorado State University for two years and transferred to Oklahoma Panhandle State University. She graduated with her degree in Agricultural Business with a minor in Animal Science. Each day at Circle H, Kayla is able to expand her knowledge. She says, “Working for Circle H has been a blessing. I can continue to grow my skills and continue to learn.”
Jamie Frazier- Herdsman
Veterinary Technician
Claribel Madrigal
Laboratory Technician
Ramona Sanchez
Laboratory Technician
Silvia Lucero
Laboratory Technician
Jacqueline Villarreal
Laboratory Technician
Ellie Mashburn- Herdsman
Veterinary Technician