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Animal Reproduction Systems, Inc.

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United States
Ontario, CA
Animal Reproduction Systems, Inc.

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

09/01/2026

Looking for an outstanding, reliable, quiet benchtop centrifuge in your breeding lab? ARS recommends, and carries the ELMI 7S-Plus centrifuge with either 4 or 6 swinging bucket rotors for 50ml centrifuge tubes. Both models are also available with adapters for 15 ml tubes in case your practice also spins blood samples or smaller semen samples (i.e. goat or canine).

The ELMI centrifuge is covered by a 2-year factory warranty, and features an easy-to-program control panel. The stainless steel interior is durable and easy to clean.

We keep all 4 options in stock, ready to ship. For more information, or to place an order, go to our website: https://www.arsequine.com/countertop-centrifuge-with-4x50ml-swinging-bucket-rotor

Or give us a call at 1-800-300-5143, Monday - Friday, 8:00 AM -4:00 PM PST where a real, live, knowledgeable person will answer your call (or at least return your call, if you leave a message on our answering machine).

08/31/2026

ARS will be closed on Monday, September 7th in observance of Labor Day.
Orders placed after 10 AM PST on Friday, September 4th, will ship on Tuesday, September 8th.

08/06/2026

Some more recommended summer reading!

ARS carries both the "Formulary and Protocols in Equine Reproduction, 4th edition" and "Foal Formulary and Field Protocol Guide, 3rd edition" created by Dr. Pat McCue and the talented team at Colorado State University's Equine Reproduction Laboratory.

Both books are spiral bound, designed to lay flat when open, and sized conveniently to fit in the glove box of your truck for easy access in mobile practices.

The Reproduction book contains over 20 pages of formulary "recipes" for chemical restraint, hormones, intrauterine therapy, uterine lavage and infusions, miscellaneous medications, and antibiotics. The protocols chapters that follow cover over 45 pages including light therapy, blocked oviducts, pregnancy detection, mastitis detection and treatment, twins, predicting ovulation, deep-horn insemination for frozen semen breeding, estrus suppression, biofilm therapy, endometritis diagnosis and treatment, placentitis, foal heat breeding, preparation of fresh and cooled semen doses, and much more.

The format for the foal book starts with the formulary portion, including medication dosages for antibiotics, sedatives and anesthesia, gastro-intestinal and anti-ulcer medications, and miscellaneous medications for mares and foals. Clinical protocols follow, including over 100 pages of neonatal foal assessment and care, handling and restraint, CPR, dummy foals, colostrum evaluation, storage, and treatment, plasma therapy, navel ill, Equine Rotavirus, flexor tendon abnormalities, hernias, and much more.

Individual books shipped in the US have the option to use USPS Media Mail for $10. Multiple book orders ship either UPS or FedEx. ARS does ship worldwide. Use the drop-down shipping menu on our website for a full range of available options.

To order the equine reproduction version, go to our website: https://www.arsequine.com/formulary-and-protocols-in-equine-reproduction-book-fourth-edition-2026

For the foal version, go to:
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 Pacific Standard Time.

08/04/2026

First time freezing a stallion? Have a stallion whose frozen semen isn't thawing well? Our E-Z Freezin Test Freeze Kits are designed to pinpoint the best extender for your stallion. The Standard kit is designed for a test freeze using 4 different extenders with 1 ej*****te sample. The kit comes complete with 2 packets each of our standard LE, standard MFR5, CryoMax LE, and CryoMax MFR5 extenders, 100 straws (25 each of 4 different colors), and instructions to freeze and evaluate your sample.
To order, go to our website at: https://www.arsequine.com/e-z-freezin-equine-semen-test-freeze-kit

Have a stallion that is proving to be a greater challenge with freezing? Our advanced test freeze kit provides 2 packets each of our CryoMax LE and CryoMax MFR5 extenders, as well as 2 packets each of the Formula 1 and Formula 2 variations on both of those extenders. Formula 1 does not contain glycerol. Formula 2 does not contain glycerol, and has a different cryo-protectant than the regular CryoMax or Formula 1 extenders. The advanced test freeze kit includes 150 straws (25 each of 6 different colors), and instructions to freeze and evaluate your sample.

To learn more about our extenders, including scientific studies, or to place an order, go to our website at: https://www.arsequine.com/e-z-freezin-cryomax-advanced-test-freeze-kit

Shipping tip: All E-Z Freezin products are shipped on dry ice, with ice packs, in well-insulated containers. We recommend Overnight and 2-day shipping, on Mondays and Tuesdays.
All E-Z freezin orders shipping via UPS Overnight or 2-day service are insured for both product loss and shipping cost.

Need more help? We're happy to answer questions! Give us a call at 1-800-300-5143, or 1-909-364-1311, Monday through Friday, 8:00 AM - 4:00 PM, Pacific Standard time. Real, knowledgeable people are here to take your call (worse case scenario, you get the answering machine - please leave a message and a real, knowledgeable person will call you back!)

08/03/2026

When prepping slides for semen motility testing, the ARS Slide Warmer is designed to keep slides, cover slips and glassware at the optimum temperature.

The Teflon coated, 7" x 11" aluminum heating surface provides an even temperature, and is easily wiped clean.

The unit features a precision solid state temperature control that is factory calibrated at 37° C (98° F) and is housed in a durable plastic case with a carrying handle for portability.

The hinged lid may be closed when not in use and the detachable power cord stores inside the case.

The Slide Warmer will operate on any 115 VAC outlet. For foreign purchases, a 230V model is available.

ARS offers slide warmers set at 37° C for use with stallions and boars, as well as a 39°C warmer for canines, and 41°C for poultry and other species with similar physiological temperatures. ARS offers all models in both 115 Volt connections for North America, and 230 Volt for foreign countries.

To order, go to our website: https://www.arsequine.com/slide-warmer-kit-115v
Or give us a call at 1-800-300-5143, Monday - Friday, 8:00 AM - 4:00 PM, Pacific Standard Time.

07/31/2026

Looking for a summer reading recommendation? ARS has the "Techniques in Equine Reproduction" 7th edition by Dr. Pat McCue at the top of our list!

This well illustrated book covers anatomy and physiology of stallions and mares, collection and evaluation techniques, insemination, cooled shipping, and freezing protocols, broodmare management, care for the newborn foal, and much more! This has been the go-to textbook for repro clinics, breeding barns, and equine reproduction courses for over two decades.

Now is a great time to brush up on your knowledge before the 2027 breeding season!

To order online, go to our website: https://www.arsequine.com/techniques-in-equine-reproduction-book
For single books, in the US only, media mail shipping is available for $10.

Or give us a call at 1-800-300-5143 or 1-909-364-1311, Monday - Friday, 8:00 AM - 4:00 PM PST

07/27/2026

Shipping cooled semen? ARS offers both the Equitainer and Travel Foal containers to get the job done!

Equitainers provide the best possible method of maintaining a consistent temperature in both hot and cold shipping conditions. The durable outer case is designed to withstand airport baggage handling for years, with a built-in shield to protect against x-rays, while the isothermalizer and freezer cans provide a consistent temperature for your shipment. ARS manufactures the Equitainer, tube style isothermalizers, and freezer cans. Replacement isothermalizers and freezer cans are available as well. For more information, or to place an order, go to:
https://www.arsequine.com/equitainer-i-shipper-tube-style

Our Travel Foal II containers (currently ON SALE!!!) offer a disposable, economical alternative to shipping cooled semen doses, available in CUP, TUBE, and SYRINGE styles depending on your packaging preference. Sold individually, or in bulk discounted 8-packs, each Travel Foal II container comes with instructions, and a dose report to effectively communicate with your clients. For more information, or to place an order, go to:
https://www.arsequine.com/store/Search.aspx?SearchTerms=Travel%20Foal%20II%20Cup%20Style%20-%20Cooled%20Shipper

ARS is open Monday - Friday, 8:00 AM - 4:00 PM PST, with a knowledgeable staff available to answer your questions or help with an order. Yes, real live people answer the phone! If you need assistance, please call us at 1-800-300-5143.

07/23/2026

ARS has Tris-EDTA solution in both 90 ml and 270 ml bottles!

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 a course of 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.

The 270 ml vial contains 9 treatments. It is recommended to use the contents of the bottle within 30 days of drawing the first dose.
Quantity discounts apply at 5-9 bottles, and 10 or more bottles.

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
or
https://www.arsequine.com/ars-tris-edta-270ml-vial

For the Formulary and Protocols in Equine Reproduction, go to:
https://www.arsequine.com/formulary-and-protocols-in-equine-reproduction-book-fourth-edition-2026

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

07/22/2026

ARS offers custom printed freezing straws. Sold by units of 100 straws, in a choice of orange, green, clear, blue, or gold.

-Print is available on 2 lines, up to 53 characters per line.

-ARS recommends using ALL CAPITAL LETTERS, and PROOF READ your order carefully - we print exactly what you enter on your order.

-If you want a date line to fill in later, use 4-6 spaces between slash marks for room to write, and put it on the top line which is easier to fill in. Use a black ink permanent ultra fine tip Sharpie, and write the dates in before you fill and freeze the straws! 😉

-Timing is everything! Custom printing can take up to a week depending on the number of orders ahead of yours. We will get your order shipped within a week, but remember to calculate both printing and shipping time into your delivery date.

-In a rush? ARS does offer expedited service on our website for an additional $20 per 100 straws. Expedited service bumps your order to the front of the line, and ships the next business day.

-If you have other items on your straw order, they will ship when the straws are done. If you need supplies sooner than the straws, please place a separate order.
To order, go to our website: https://www.arsequine.com/custom-printed-freezing-straws
Or give us a call at 1-800-300-5143, Monday - Friday, 8:00 AM - 4:00 PM Pacific Standard Time

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

Website

http://www.arssales.com/

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