Animal Reproduction Systems, Inc.

Animal Reproduction Systems, Inc. Animal Reproduction Systems produces artificial insemination equipment for equine, livestock, poultry, and canine breeders.

Founded in 1980, as a division of Dupree, Inc., a company with deep roots in the aerospace industry, Animal Reproduction Systems (ARS) applied engineering science, high-tech electronics, and quality manufacturing processes to create products that set industry standards for animal breeding practices. Since our first product, the Model 534A Densimeter, known in the industry as the "Blue Box" stallio

n s***m counter, ARS has continued to manufacture and improve state-of-the-art equipment for equine, bovine, porcine, poultry, and canine breeding programs. In August 2014, Animal Reproduction Systems, Inc. was established as Doug and Kathy Thistlethwaite took over the reins of ARS. For twenty-six years Doug had worked for Dupree, Inc., in both the ARS division and as the head of their engineering department. He holds United States patents for the ARS densimeter, and has designed many of the products we carry. Doug met Kathy in 1985, in a fencing class, while they were attending California State Polytechnic University, Pomona. At that time, she was starting colts at the BJ Cuttin' Horse Ranch, owned by Jim and Bunny Dupree, and he was working for General Dynamics. As their courtship developed, Doug became a frequent visitor to the ranch, which later led to a job offer from Dupree, Inc. The Thistlethwaite's were established in 1988, and the rest is history still in the making. Doug, Kathy, and the rest of the ARS staff are looking forward to continuing the traditions of producing high-quality, innovative products, and providing excellent customer service to our valued clients. Please visit our website at www.arssales.com for a full description of our products. Business Hours
8:00 AM - 4:30 PM (Pacific Standard Time) Mon-Fri

Telephone:
1-800-300-5143 (US Sales)
1-909-364-1311
1-909-393-6670 (Outside the US)

Fax:
1-909-364-1611 (US)
001-909-364-1611 (Outside the US)

With Thanksgiving being on Thursday, November 27, please plan ahead when making orders.  UPS and FedEx will not be deliv...
11/21/2025

With Thanksgiving being on Thursday, November 27, please plan ahead when making orders. UPS and FedEx will not be delivering on 11/27/25.
If you need temperature sensitive products (E-Z Freezin extender or IgG tests), please order early to ship on Monday, and we recommend overnight shipping for Tuesday delivery. Normal delivery schedules will resume on Monday, December 1st, however holiday shipping may delay deliveries due to the increased volume.

ARS will be closed on Thursday, November 27, and Friday, November 28. Orders placed after 10 AM on Wednesday, November 26 will ship on Monday, December 1st when we return to the office.
To place orders, visit our website: www.arsequine.com, or give us a call at 1-800-300-5143, or 1-909-364-1311 Monday - Friday (except for the Thanksgiving holiday), 8 AM - 4 PM Pacific Standard Time.

ARS will be closed on Thursday, November 27th, so our employees can enjoy Thanksgiving feasting with friends and family....
11/21/2025

ARS will be closed on Thursday, November 27th, so our employees can enjoy Thanksgiving feasting with friends and family. We will also be closed on Friday, November 28th, to enjoy some post-feast bliss and Black Friday shopping. Keep an eye on our web site for some ARS Black Friday deals! www.arsequine.com

We will be back in the office on Monday, December 1st, ready to help you stock your breeding lab and foaling barn for the 2026 season. Orders arriving after 10 AM on Wednesday, November 26 will ship on Monday, December 1st.

Happy Thanksgiving to all!

This handsome Blue Slate tom was "Sapphire", our daughter's turkey who enjoyed many Thanksgiving cornbread muffins in the 9 years he spent strutting about our farm.

New for 2025, ARS now manufactures Tris-EDTA solution.Tris-EDTA solution is used in conjunction with antibiotics to trea...
11/19/2025

New for 2025, ARS now manufactures Tris-EDTA solution.

Tris-EDTA solution is used in conjunction with antibiotics to treat bacterial endometritis in mares. Tris-EDTA breaks down the protective biofilm barrier surrounding gram-negative bacterial isolates, creating a significantly more effective antibiotic treatment of uterine infections.

The 90 ml vial provides three treatments when following the protocols provided in the "Formulary and Protocols in Equine Reproduction" book published by the Colorado State University Equine Reproduction Laboratory.

Bacterial endometritis is an important cause of reduced fertility in mares.

This product should be used under the advise and recommendation of a veterinarian.

For additional information, or to place an order, go to our website: https://www.arsequine.com/tris-edta-90

To order the "Formulary and Protocols in Equine Reproduction" go to: https://www.arsequine.com/formulary-and-field-protocol-in-equine-reproduction-third-edition

Foaling season is right around the corner!  The 2024 Foal Formulary and Field Protocol Guide is an up to date, practical...
11/07/2025

Foaling season is right around the corner!

The 2024 Foal Formulary and Field Protocol Guide is an up to date, practical guide to medication dosages and field protocol treatments specifically for foals. Created by Colorado State University's College of Veterinary Medicine and Biomedical Sciences, this book is the perfect addition to a mobile practice or veterinary clinic. Packed with valuable information, bound to open and lay flat for easy hands-free reference, and small enough to fit in the glove box of your truck. Priced at $24.95, it makes a great gift for a practice partner or breeding manager!

To order, go to our website:
https://www.arsequine.com/foal-formulary-and-field-protocol-guide

or give us a call at 1-800-300-5143, Monday - Friday 8:00 AM - 4:00 PM.

Being ready for foaling season includes big plans along with a lot of small details.  Preparation is the key to success....
11/06/2025

Being ready for foaling season includes big plans along with a lot of small details. Preparation is the key to success.

We carry an extensive line of foaling supplies ranging from our Deluxe and Standard Foaling kits to a nasal aspirator bulb that really sucks (in a good way!). From an Equine Colostrum Refractometer to Mayo Scissors that can cut through a tough umbilical cord, or Predict-A-Foal kits to help you prepare for some late night watch duty, ARS is here to help you stock your foaling barn for the new season!

Please visit our website: https://www.arsequine.com/foaling to see our complete product line.
Need more information, or help placing an order? Give us a call at 1-800-300-5153, Monday - Friday 8:00 AM - 4:00 PM.

Hot off the press!  ARS is delighted to announce our 7th edition "Techniques in Reproduction" textbook is being printed ...
11/04/2025

Hot off the press! ARS is delighted to announce our 7th edition "Techniques in Reproduction" textbook is being printed as we post, and expected to arrive by the New Year.

Pre-orders made by December 31 will receive an $8 discount off the cover price ($48). Orders must be for BOOKS ONLY, to avoid delays in shipping other supplies. If you are in the United States, and would like to use USPS Media Mail, the cost is $10, and may be selected in the shipping choices. Multiple books, or orders containing additional products are not eligible for the $10 Media Mail shipping offer.

To order, please go to our website:
https://www.arsequine.com/techniques-in-equine-reproduction-book

AAEP has a free webinar coming up on Nov. 5th for owners of older equines.  Registration is required.  Sign up and take ...
10/29/2025

AAEP has a free webinar coming up on Nov. 5th for owners of older equines. Registration is required. Sign up and take care of those seniors!

DON'T MISS OUR LAST HORSE OWNER EDUCATION WEBINAR OF 2025! 📢

Join us next Wednesday, Nov. 5, for "Care and Management of the Elderly Equine".

Just like people, the needs of horses change as they continue to age. Members of the AAEP Horse Owner Education committee will present on a wide range of topics to help you properly care for the elderly equine in your life. Discussion points will include diet, dentistry, common diseases and illnesses, preventative care, and more. Do not miss this informative session on how to help your older horse live its best life!

Registration is FREE but required. A recording of the webinar will be available if you miss the live event.

Register here: https://events.zoom.us/ev/Ah5yOsCebSifxMhDsKU4IL28l58V2uXLCCZy2BJfr1cVGkPrhte-~AkTrbyktZL-X6LN0LpntEqMChUPte_sAlD_Vc22m-q6fZUf_K_Bby90XhQ

This informative session is brought to you by the AAEP Horse Owner Education Committee.

Registration is still open for the Colorado State University Equine Reproduction Short Course.  These spots fill up fast...
10/29/2025

Registration is still open for the Colorado State University Equine Reproduction Short Course. These spots fill up fast, so don't hesitate to get enrolled.

The flagship course of the program is designed for horse owners and breeders to increase the efficiency and ultimately the success of their breeding programs. Cost is $2,500 for 5 full days of hands-on learning and insightful lectures. Course is designed for horse owners, breeders, and breeding assi...

Terrific opportunity to learn at a top-notch facility.
10/27/2025

Terrific opportunity to learn at a top-notch facility.

𝗦𝘂𝗺𝗺𝗲𝗿 𝗶𝗻𝘁𝗲𝗿𝗻𝘀𝗵𝗶𝗽𝘀 𝗮𝗿𝗲 𝗻𝗼𝘄 𝗼𝗽𝗲𝗻!
Applications for the 2026 Summer Internship are due December 31, 2025. The internship season runs May through mid-October, with exact dates flexible based on college schedules.

This program offers a unique opportunity to gain hands-on experience across the ranch, cattle, and equine divisions of the Four Sixes Ranch. Interns assist in the final stages of breeding season through July 1, participate in the daily care and preparation of sale horses, and help with halter-breaking weanlings.

Interns also shadow the resident veterinarians and staff, assisting with medical treatments, surgeries, and procedures, while working alongside the ranch farriers with trimming and shoeing. Throughout the season, students gain valuable insight into managing a large-scale horse and cattle operation while building the skills and experience needed for a future in the livestock and equine industries.

💻 Apply now or learn more: http://bit.ly/3JulGUC

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Foaling season is just around the corner!  Preparation is the key to success when bringing those eagerly anticipated col...
10/27/2025

Foaling season is just around the corner! Preparation is the key to success when bringing those eagerly anticipated colts and fillies into the world.

Having a well-stocked foaling kit, including an equine colostrum refractometer is essential to giving those new foals the best possible start. Our ARS Equine Colostrum Refractometer is calibrated specifically for mare's milk. It's easy to use, only requires a few drops of colostrum, and can be read immediately.

For an excellent explanation of the importance of evaluating mare colostrum, please follow this link to the article written by Dr. Pat McCue at the Colorado State University Equine Reproduction Laboratory: https://www.arssales.com/colostrum_101.html

To order online, go to: https://www.arsequine.com/equine-colostrum-refractometer

Are you ready for foaling season?  ARS is!
10/14/2025

Are you ready for foaling season? ARS is!

Deluxe Foaling Kit

Foaling season is right around the corner.  The key to success is preparation, and ARS has a wide range of foaling suppl...
10/14/2025

Foaling season is right around the corner. The key to success is preparation, and ARS has a wide range of foaling supplies to help you be ready for those special deliveries.

ARS offers two foaling kits - our standard one (AFK-101) is a great way to have foaling supplies all in one convenient box. It includes a fast reading thermometer, stethoscope, nasal aspirator, enemas, umbilical clamps, umbilical tape, gloves, navel dipping tube, terrycloth towel, Surgilube, a 60" obstetrical strap, 7" stainless steel Mayo scissors, a placenta cord, and more! Our deluxe kit (AFK-201) includes all the standard supplies, plus an Equine Colostrum Refractometer and an E-Z Breather Foal Resuscitator.
Both kits are packaged in a sturdy box with a carrying handle. For more details, to view all of our foaling supplies, or to place an order, please visit our website:

https://www.arsequine.com/deluxe-foaling-kit2

Or give us a call at 1-800-300-5143, Monday - Friday, 8 AM - 4 PM Pacific Standard Time.

Deluxe Foaling Kit

Address

1901 S. Lynx Place
Ontario, CA
91761

Opening Hours

Monday 8am - 4pm
Tuesday 8am - 4pm
Wednesday 8am - 4pm
Thursday 8am - 4pm
Friday 8am - 4pm

Telephone

+19093641311

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