About Us

View:

Mission Statement

Vision Statement

Operating Philosophy

Veterinarians:

Staff:

Mission Statement

The mission of Circle H Headquarters LLC is to provide high quality health and production management services and information to animal production systems and allied industries.

Vision Statement

The vision of Circle H Headquarters LLC is to create value and success for owners, employees, our clients and the community by being the preferred service and information provider and an integral part of our client’s management teams through the attraction and retention of high quality individuals.

Operating Philosophy

We believe it is our responsibility to protect, conserve and advance the inputs surrounding food animal health and production. We will deliver accurate, balanced information and provide professional services in an ethical manner. We have this obligation to clients, animals, employees and community.

Veterinarians:

Dr. C. Scanlon Daniels

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 wife Angela, and sons Eric, Luke and Judd. 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 ASSOCIATIONS
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 Present)
National Pork Board Veterinary Advisory Group (2003 to Present)

PUBLICATIONS & 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.

Dr. Angela M. Daniels

Dr. Angela M. Daniels was born in Southeast Iowa and was raised on a diversified farm where her family raised beef cattle, hogs, corn and soybeans. She graduated from Iowa State University with Bachelor of Science degrees in Dairy and Animal Science in 1995. She then entered the College of Veterinary Medicine at Iowa State University and received a Doctor of Veterinary Medicine in 1999.

After graduation, Dr. Daniels accepted a position with Dr. C.J. Johanns in his Dairy Production Medicine business. Their clients were spread across the state of Iowa and their services centered on reproduction and record analysis. After a job transfer moved their family to the Oklahoma and Texas Panhandle region, she worked with Dr. Dan Kullot in Syracuse, KS as well as the Dalhart Animal Hospital before accepting a Staff Veterinarian position with Seaboard Farms, Inc. During her three years at Seaboard Farms, she was responsible for health of one segment of some 48,000 sows and their down flow production. An area of interest for Dr. Daniels was food safety and she worked on projects involving needle-free injections and Trichinae certification to promote food safety for the company.

In 2002, she rejoined the Dalhart Animal Hospital to focus on dairy production medicine for new producers in the Dalhart region. In January of 2004, she and Dr. C. Scanlon Daniels founded Circle H Animal Health, LLC where she continued her work in the dairy field.

Dr. Daniels lives in Dalhart, TX with her husband Scanlon and sons Eric, Luke and Judd. Her professional interests are in the areas of milk quality, replacement heifer production, food safety, and livestock research. Her involvement in professional organizations and publications is outlined below.

PROFESSIONAL ORGANIZATIONS
Academy for Rural Veterinarians (2005 to Present)                                                        Academy for Veterinary Consultants (2002 to Present)                                                 American Association of Bovine Practitioners (1995 to Present)
AABP Mastitis Committee (2003 to 2009)                                                                         AABP Membership Committee (2009 to Present)
American Association of Swine Veterinarians (1995 to Present)
American Veterinary Medical Association (1995 to Present)                                                 NMC, a Global Milk Quality Organization (2000 to Present)
Dalhart Area Chamber of Commerce (2004 to Present)
Professional Dairy Heifer Growers Association (2005 to Present)

PUBLICATIONS & PRESENTATIONS
Menke, A. L. 1994. Evaluation of activity monitors for detection of estrus in dairy cattle. J. Dairy Sci. 72:393.

Menke, A. L. and C. R. Youngs. 1995. Iowa Cattlemen's Association 1994-1995 Bull Evaluation Program Project. Iowa Cattlemen's Association Bull Evaluation Program 1994-1995 Annual Summary. Section 7, pp 5-14.

R. F. Rosenbusch, A. M. Daniels, E. L. Carney, T. H. Smith. 1996. Incidence of colostrums infected with Mycoplasma bovis among Iowa dairy herds and impact on respiratory tract infection in calves. Iowa State University Dairy Report DSL-105.

Halbur, P. G., A. M. Daniels and R. F. Rosenbusch. 1997. Morphologic changes and tissue dissemination following intrathoracic or subcutaneous inoculation of Mycoplasma bovis in neonatal Holstein calves. Presented at the ISU Merck's Scholar Awards.

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.

Bovine Veterinarian, September 2004, "Tools of the Trade", pp 32-34, 36, "Consider Visual Treatment Protocols" p 14.

Southwest Dairyman, vol 4 no 2, "New Milk Quality and Livestock Diagnostic Disease Lab Opens in Amarillo", p 8.

Dairy Herd Management, February 2005, Dairy Veterinary Trends 2004 insert, "Vaccine Protocols That Sing", p6.

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.

Bovine Veterinarian, September 2005, "Creating New Haul-in Facilities", pp 70-72, 74.

Feedstuffs, December 12, 2005, vol 77 no 51, "Cheese Plant Sparks Dairy Boom", p 20.

Dairy Herd Management, March 2007, "Listen to Your Cows" , p 82.

Dairy Herd Management, June 2007, "Choose the Right Mastitis Tube", p 66.

Dairy Herd Management, September 2007, "Choosing the Right Vaccine", p 60.

Dairy Herd Management, December 2007, "The Value of a Dead Animal", p 54.

Dairy Herd Management, February 2008, "Cleanliness Matters", p 38.

Dairy Herd Management, May 2008, "Don't Ignore Johne's Disease", p 46.

Dairy Herd Management, August 2008, "An Interview with Staph aureus", p 30.

Dairy Herd Management, November 2008, "Quantum Leaps in Calf Immunology", p 46.

Dairy Herd Management, February 2009, "Syringeology", p 38.

Bovine Veterinarian, January 2009, "Better Safe Than Sorry", pp 8-12.

Dairy Herd Management, May 2009, "A Fly on the Wall", p 42.

Dairy Herd Management, August 2009, "Don't Skip This Column!", p 30.

Dairy Herd Management, November 2009, "Head and Shoulders Above the Rest", p 54.

Dairy Herd Management, February 2010, "Publicity You Don't Need", p 38.

Dr. Bill R. DuBois

Dr. William (Bill) R. DuBois, DVM, ABVP, is from eastern Oklahoma where his family has a commercial cow-calf operation. He graduated from Oklahoma State University with a Bachelor of Arts degree in Spanish in 1992 and Doctor of Veterinary Medicine in 1996. After graduation, he joined Oliphant Veterinary Clinic in Offerle , KS , as an associate veterinarian. He then worked as an associate veterinarian at Veterinary Medical Associates in Cushing , OK .

He completed a Food Animal Medicine and Surgery Residency at Oklahoma State University in 2000. After completion of the residency, he joined the faculty in the Department of Large Animal Clinical Sciences at the University of Tennessee as an assistant professor teaching food animal medicine and surgery.

Dr. DuBois joined Veterinary Research and Consulting Services in Greeley , CO in 2003. As an Associate Veterinarian, Dr. DuBois was involved in beef feedlot consultation and contract research. While with VRCS, he worked as part of a team to develop, implement, and monitor animal health programs for over 2 million cattle received per year. One of the primary focuses of the practice was to train and work closely with animal health personnel.

In January of 2006, Dr. DuBois joined Circle H Animal Health. He will team with Dr. Scanlon Daniels to provide consultation services for swine clients, as well as continue contract research.

Dr. DuBois currently resides in Mustang, OK with his wife Angela, daughter Iris and son Vince. Dr. DuBois' 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

Diplomat of the American Board of Veterinary Practitioners Food Animal Specialty (2001-Present)

American Veterinary Medical Association (1996-Present)

American Association of Bovine Practitioners (1999-Present)

American Association of Swine Veterinarians (1999-Present)

Academy of Veterinary Consultants (2002-Present)

Tennessee Veterinary Medical Association (2000-2002)

Oklahoma Veterinary Medical Association (2000-2002)

PUBLICATIONS & PRESENTATIONS

Rogers KC, DuBois WR, Portillo TA, Miles DG. Effects of two dosage levels of doramectin on health, growth performance and carcass characteristics in finishing beef steers. The Bovine Practitioner 38(2): 171-176 ,2004.

DuBois WR, Prado TM, Ko JCH, Mandsager RE, Morgan GL. A comparison of two intramuscular doses of xylazine-ketamine combination and tolazoline reversal in llamas. Veterinary Anaesthesia and Analgesia 31(2): 90-96, 2004.

Kirkpatrick JG, Fulton RW, Burge LJ, DuBois WR, Payton M. Passively transferred immunity in newborn calves, rate of antibody decay, and effect on subsequent vaccination with modified live virus vaccine. The Bovine Practitioner 35(1): 47-55, 2001.

DuBois WR, Cooper VL, Duffy JC, Dean DD, Ball RL, Starr BD. A preliminary evaluation of the effect of vaccination with modified live bovine viral diarrhea virus (BVDV) on detection of BVDV antigen in skin biopsies using immunohistochemical methods. The Bovine Practitioner 34(2): 98-100, 2000.

DuBois WR. Bovine vaccinology for beef cattle producers. Proceedings UT Beef and Forage Field Day. 2002.

DuBois WR. Urolithiasis in small ruminants. Proceedings of the North American Veterinary Conference. 2002.

DuBois WR. Injectable anesthesia in llamas and alpacas. Proceedings of the North American Veterinary Conference. 2002

Daugherty R, DuBois WR, Hopkins F, Welborn M. Health Management of Beef Cattle, in Tennessee Master Beef Producer Manual. Agriculture Extension Service, University of Tennessee . p 8-1 to 8-27.)

DuBois, WR. Bovine viral diarrhea virus: an update. Tennessee Veterinary Medical Association Tennessee Cattlemen's Association Veterinary Continuing Education Meeting. Frankin, TN. October 2001.

DuBois, WR. An introduction to standardized performance analysis in beef herds. Tennessee Veterinary Medical Association Tennessee Cattleman's Association Veterinary Continuing Education Meeting. Frankin, TN. October 2001.

DuBois WR. On farm biosecurity measures for the cow-calf producer. Tennessee Cattleman's Association Annual Convention. Franklin , TN. October 2001.

Dr. Margaret Perala

Dr. Margaret Perala was born and raised in southern Ontario, Canada. Although she lived in the city, she spent all her free time at her uncle’s beef farm. She attended the University of Guelph and received her Bachelor’s of Science degree in 1997. After graduation, Margaret moved to the United States working on various wildlife research projects. She attended the University of Minnesota and graduated with a Doctor of Veterinary Medicine in 2009. Upon graduation, Margaret worked in a six doctor large animal practice in Ionia, Michigan before coming to Circle H Headquarters in April 2010.

Outside of veterinary medicine, Margaret enjoys the outdoors and looks forward to a great pheasant season with her English Setter, Quinn and husband Ted.

Margaret’s professional interests include cattle stockmanship, milk quality and parlor performance, and preventative medicine. Her professional memberships and publications are listed below.

PROFESSIONAL ORGANIZATIONS:

American Association of Bovine Practitioners (2009 - present) American Veterinary Medical Association (2009 – present) North American Falconry Association (2009-present)

PUBLICATIONS & PRESENTATIONS

Rapnicki, P. and Perala,M. Dairy Stockmanship. Northeast Dairy Production Symposium. March 2010

S. C. Stewart, P. Rapnicki, J. R.Lewis, and M. Perala. 2007. Detection of Low Frequency External Electronic Identification Devices Using Commercial Panel Readers. Journal of Dairy Science 90: 4478-4482

Perala, M. Use of RFID using commercial Panel Readers on a commercial dairy. Minnesota Spring Dairy Conference, University of Minnesota May 2007

Dr. Conrad M. Spangler

Dr. Conrad M. Spangler was born and raised near Hillsboro, Iowa on a family dairy operation - Spangler Dairy. He attended Iowa State University and received his Bachelor’s of Science degree in Dairy Science in 2005, and continued his education at the University of Minnesota receiving his Doctor of Veterinary Medicine degree in 2009. During his undergraduate studies and into veterinary school, Dr. Spangler traveled internationally to China and Spain studying agriculture as well as giving dairy group presentations. While in veterinary school, Conrad held leadership roles in the Bovine Production Medicine Club as both president and vice president; as well as the Alpha Psi Veterinary Fraternity as vice president. He was awarded the 2008 AABP Bovine Student Recognition Award, 2007 AABP Amstutz Scholarship, 2008 Western Veterinary Conference Scholarship and two University of Minnesota Veterinary scholarships - Class of 1960 Memorial Scholarship and the 2007 Caleb Dorr Certificate.

Conrad has gained work experience from a variety of places to help prepare him for a career in production animal medicine. These include the following: Perry Veterinary Clinic in Perry NY, Circle H Headquarters LLC, National Animal Disease Center in Ames IA, American Protein Corporation in Ames IA, Lone Oak Veterinary Clinic in Visalia CA, National Veterinary Services Laboratories in Ames IA and the Spangler Dairy in Hillsboro IA.

Conrad and his wife, Erin, have recently moved to Dalhart. They enjoy being newlyweds and riding their Harley. Conrad also enjoys playing a variety of sports and powerlifting.

Dr. Spangler’s current area’s of interest are milking parlor evaluation, health financial analysis and preventative medicine. His professional memberships and publications and presentations are listed below.

PROFESSIONAL ORGANIZATIONS:

American Association of Bovine Practitioners (2009 - present) AABP Milk Quality and Udder Health Committee (2009 - present) American Association of Swine Veterinarians (2009 – present) American Veterinary Medical Association (2009 – present)

Arturo Ruiz, DVM, MSc

Arturo Ruiz was born and raised in Mexico. He attended De La Salle University in Leon, Guanajuato Mexico from 1980 to 1985 where he earned his Doctor in Veterinary Medicine degree. Several years later he attended National Autonomous University of Mexico in Mexico City, Mexico from 1994 to 1995 and became a Diplomat in Bovine Animal Production. Wanting to continue his education, he relocated to Guelph, Ontario Canada. In 2001 he enrolled in English as a Second Language class at Conestoga College in Kitchener, Ontario. At the same time he started in the Department of Population College at the Ontario Veterinary College in Guelph, Ontario Canada. In 2006 he earned a Master of Science degree.

Arturo has gained work experience from a variety of places to help prepare him for a career in the dairy and swine industries. From 1994 to 1996, he provided technical training of dairy producers on artificial insemination. Then from 1997 to 2000, he worked as an independent dairy health management practitioner attending farms in Leon, Silao and San Francisco de Rincon, La Barca Mexico. Once he relocated to Canada, he worked as a breeding supervisor in Alliston, Ontario Canada and then as a research assistant in bovine reproduction at the University of Guelph from 2000 to 2003. It was in 2003 that he worked as a graduate research assistant in sow reproduction and later worked as a breeding supervisor in sow reproductive programs in Guelph, Ontario Canada. In 2007 he moved to the U.S. and worked as a training and breeding supervisor in gilts for Iowa Select Farms until joining Circle H Headquarters LLC in 2009.

Arturo lives in Dalhart TX while his family still resides in Guelph, Ontario Canada. He enjoys jogging and spending time with his German Shepherd, Tuck.

Professional Publications and Presentations:

De Grau AF and Ruiz A, Reproduction basics for farm workers, Carthage Veterinary Services 15^th annual swine conference, August 30, 2005, Carthage IL

Ruiz A, De Grau AF, Friendship RM, Poljak Z, Wilson ME, Groenewegen P, Ward JH, Rozeboom, KJ, Cassar G., Effect of different levels of dietary selenium in semen quality of boars, Proc Alltech 21st International symposium, Lexington. Kentucky, May 22-25, 2005.

De Grau AF Ruiz A, Wilson ME, Friendship RM, Ward JH, Roseboom KJ., Effectos fisiologicos y cambios en la calidad de semen en sementales tratados con PGF₂alpha, AMVEC Mexico City, 2005.

De Grau AF, Ruiz A, Wilson ME, Friendship RM, Ward JH, DeVries S., Physiological effects and semen quality changes in boars treated with PGF₂αlpha, Leman Conference, Minneapolis, Sept 2005.

RESEARCH PROJECTS:

Prevalence of Salmonella spp, Yersinia spp, Campylobacter spp, E. coli 0157:H7 and Toxoplasma gondii; blood and fecal sample collection from 80 swine herds.

Effect of supplementation of boars ration with two sources of selenium (Inorganic vs. organic) to compare its effect on semen quantity and quality.

Physiological effects and semen quality changes in boars treated with PGF₂alpha prior to semen collection.

Effects of insemination techniques on fertility on sows: synchronization of ovulation and breeding using a single artificial insemination dose compared to traditional doses.

Evaluation of different doses of frozen semen using and its effect on conception rates in gilts.

Boar spermatozoa cryopreservation project, Swine Research Station Arkell/University of Guelph. Ruiz A., Kirkwood R. Michigan State University.

Ultrasonographic evaluation of the effect of different doses of pLH on induction of ovulation in sows. Project sponsored by BIONICHE.

In-Vitro fertilization, embryo transfer, superovulation protocols, embryo recovery, follicular aspiration and synchronization protocols in dairies.

Our staff is here to assist our clients. We know that you will receive friendly and personalized service, just what you would expect from Circle H.

Customer Service

Karen Ward, Accounting Manager

Karlie Emerson BS LVT, Veterinary Technician

Laboratory

Karla Jesko, Laboratory Manager

Regina Nials, Laboratory Technician

Melissa Montoya, Laboratory Technician