Animal Reproduction Systems, Inc.

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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" stallion 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)

Being ready for foaling season includes big plans along with a lot of small details.  Preparation is the key to success!...
10/16/2026

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 including:
- Deluxe and Standard Foaling kits
- A nasal aspirator bulb that really sucks (in a good way!)
- ARS Equine Colostrum Refractometer calibrated for mare's milk
- Mayo scissors that can cut through a tough umbilical cord
- Predict-A-Foal kits to prepare you for some late night watch duty
- E-Z Pass enemas designed to break up meconium impactions
- Foal Formulary and Field Protocol Guide
- "Techniques in Equine Reproduction" 7th Edition

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.

It has come to our attention that curiosity about the contents of Equitainers has resulted in some containers being open...
10/12/2026

It has come to our attention that curiosity about the contents of Equitainers has resulted in some containers being opened by shipping companies. ARS recommends shipping Equitainers inside boxes to eliminate the visual temptation to explore beyond the latched closed lid, and reduce wear and tear on the latches and hinges. Every Equitainer sold is shipped in its own box when it leaves ARS, so you'll already have a box that is the perfect size.

To order a tube-style Equitainer, or replacement isothermalizers, and freezer cans, go to our website:
https://www.arsequine.com/equitainer-i-shipper-tube-style
Or give us a call at 1-800-300-5143, Monday - Friday 8:00 AM - 4:00 PM PST

Sometimes a tried and true product comes through in an unexpected way.  For years, ARS has trusted Tergazyme for effecti...
09/28/2026

Sometimes a tried and true product comes through in an unexpected way. For years, ARS has trusted Tergazyme for effectively cleaning labware and latex AV liners. However, it also does a fantastic job cleaning solar panels!

This enzymatic detergent is designed to break down protein (semen, sm**ma, blood, tissue debris...), and rinses away quickly. Great for the repro lab, and also for cleaning bird droppings off of solar panels!

The concentrated formula requires only 3 Tablespoons of Tergazyme in a gallon of warm water. The 4 lb box can make up to 52 gallons of cleaning solution.

Tergazyme is now available in a plastic container, with a resealable flip-top lid for easy access, and improved sealed storage.

To order, go to our website at: https://www.arsequine.com/terg-a-zyme-detergent-powder
Or give us a call at 1-800-300-5143 or 1-909-364-1311. We're in the office Monday - Friday, from 8:00 AM - 4:00 PM Pacific Standard Time

CSU Equine Reproduction Internship opportunity
09/24/2026

CSU Equine Reproduction Internship opportunity

Come work with us! šŸŽ‰šŸ“

Our 2027 Equine Reproduction Internship is now open!!!

Interns will participate in a breeding season internship program (non-DVM) and rotate through Mare, Stallion and Foaling shifts. Training may include:

Stallion
šŸ”¹Stallion handling
šŸ”¹Stallion management
šŸ”¹Semen collection
šŸ”¹Preparation of cooled-transported semen
šŸ”¹Semen evaluation
šŸ”¹Semen freezing
šŸ”¹Stallion collection cleaning protocols

Mare
šŸ”¹Hormone therapy
šŸ”¹Reproductive management of mares
šŸ”¹Artificial insemination
šŸ”¹Embryo transfer management
šŸ”¹Restraint for farrier work
šŸ”¹Reproductive management of mares
šŸ”¹Care of the pregnant mare
šŸ”¹Overnight foal watch; care of the newborn foal
šŸ”¹Dystocia management
šŸ”¹Herd health management

More info can be found at:
https://csusystem.wd12.myworkdayjobs.com/fortcollins_careers/job/Fort-Collins-CO/Equine-Reproduction-Intern_R2026107261

DEADLINE is FRIDAY October 23rd.

First time freezing a stallion?  Have a stallion whose frozen semen isn't thawing well?  Our E-Z Freezin Test Freeze Kit...
09/18/2026

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.

Our Standard Test Freeze Kit contains 4 different extenders to be used 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...

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 of both of those extenders. The Formula 1 version does not contain glycerol. Formula 2 does not contain glycerol, and has a different cryo-protectant than the regular CryoMax or Formula 1 extenders, providing a smaller chain molecule to minimize cell damage during both the freezing and thawing stages. 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!)


If you're in the Sacramento area, make plans to attend this event!  Lots of excellent information and exhibitions on dis...
09/09/2026

If you're in the Sacramento area, make plans to attend this event! Lots of excellent information and exhibitions on display at the UC Davis Horse Day, Saturday, October 10, 2026.

REGISTRATION IS NOW OPEN for UC Davis Horse Day! Head on over to our website to register and find more information on pricing, session topics, schedule, and more. We can't wait to see you at this year's event!

https://animalscience.ucdavis.edu/horseday

Pumpkin Spice season is upon us!  "Orange" you glad? ;)  ARS has colorful ways to help organize your frozen semen straws...
09/04/2026

Pumpkin Spice season is upon us! "Orange" you glad? ;)
ARS has colorful ways to help organize your frozen semen straws, including orange custom printed straws, and orange cane tabs! We offer other colors as well, so your storage dewar can be a nod to the spectacular fall colors just around the corner.

To order, head to our website: https://www.arsequine.com/freezing-supplies where you'll find a complete line of freezing supplies, including canes, goblets, dewars, centrifugation media, and our outstanding line of E-Z Freezin extenders and test freeze kits.

Excellent opportunity for the right person to gain experience and be a part of this historical Morgan Horse Farm.
09/04/2026

Excellent opportunity for the right person to gain experience and be a part of this historical Morgan Horse Farm.

🐓 UVM Morgan Horse Farm Apprenticeship Applications Are Open!

Dreaming of a future in equine management, breeding, training, or heritage conservation? The UVM Morgan Horse Farm Apprenticeship Program is now accepting applications for our 2027 openings.

This immersive, hands‑on program places apprentices at the heart of daily farm operations - from horse care and facility management to breeding, foaling, and public education. Apprentices learn directly from experienced staff while contributing to the legacy of America’s oldest continuous Morgan breeding program.

If you’re passionate, hardworking, and eager to grow your skills in a professional equine environment, we encourage you to apply.

Build your foundation. Learn the heritage. Join the tradition.
Apply today and take your next step in the horse world!

Email us at [email protected] for more information!

A great opportunity for the right person to gain a lot of equine reproduction experience at a legendary ranch.
09/02/2026

A great opportunity for the right person to gain a lot of equine reproduction experience at a legendary ranch.

Looking for an outstanding, reliable, quiet benchtop centrifuge in your breeding lab?  ARS recommends, and carries the E...
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).

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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