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)

CSU offers a foaling refresher course online.
01/07/2026

CSU offers a foaling refresher course online.

📣Foaling Season is here!

Need a refresher? Our online short course is self-paced and only $100!

The specific goals of the course are to provide practical information on care of the late-term pregnant mare, how to predict impending foaling, the normal series of events during an uneventful foaling, early recognition of a dystocia plus when/how to intervene and when to call for assistance, how to stimulate breathing to resuscitate a foal following birth, how to evaluate an equine placenta and recognize important abnormalities, review post-partum complications of the mare, discuss how to provide routine care to a newborn foal, outline common medical problems of neonatal foals, and review developmental milestones that occur during the first year of a foal’s life. This course is designed to provide foaling attendants with critical information needed to make appropriate decisions in difficult situations that will hopefully lead to a positive outcome regarding the health and well-being of both the mare and her newborn foal.

👇For more info visit
https://csuvetce.com/catalog/equine/foaling-and-foal-care/

Happy New Year, and Happy Birthday to the horses of the northern hemisphere!
01/01/2026

Happy New Year, and Happy Birthday to the horses of the northern hemisphere!

Good information to review before your mare goes into labor...
12/31/2025

Good information to review before your mare goes into labor...

WHAT TO EXPECT WHEN YOUR MARE IS EXPECTING

If your mare has made it through 11 months of pregnancy, you're almost there. Labor and delivery, while momentous, are generally uncomplicated; however, being a prepared and informed owner will help you keep your anxiety in check so you can assist the new mother and foal get off to a great start.

Here are some things you can do to prepare for the arrival of your four-legged bundle of joy:

• Read this article about caring for the foaling mare and newborn: https://aaep.org/horsehealth/foaling-mare-newborn-preparing-safe-successful-foal-delivery
• Consult with your veterinarian to make a plan well in advance of the birth.
• Clean and disinfect the stall as thoroughly as possible. Provide adequate bedding.
• Wash the mare's udder, v***a and hindquarters with a mild soap and rinse thoroughly.
• Wrap the mare's tail with a clean wrap when you observe the first stage of labor. Be sure that the wrap is not applied too tightly or left on too long, as it can cut off circulation and permanently damage the tail.
• Time each stage of labor, to help you keep accurate track of the mare's progress. Take written notes! When you're worried or anxious, your perception of time can become distorted.

As always, these are general guidelines and you should contact your veterinarian for more information. Good luck! And if your foal has already made their grand entrance into the world, please share a picture with us!

Happy New Year's Eve!  As 2025 comes to a close, ARS extends a huge "Thank You!" to all of our clients, researchers, sup...
12/31/2025

Happy New Year's Eve!
As 2025 comes to a close, ARS extends a huge "Thank You!" to all of our clients, researchers, suppliers, and employees who continue to strive for excellence in the animal reproduction industry. We're looking forward to 2026, the Year of the Horse!

ARS will be closing at 2:00 PM today, so our employees can head home to enjoy their New Year's Celebrations.

We will be CLOSED on New Year's Day.

We'll be back in the office, ready to celebrate 2026, the Year of the Horse, on Friday, January 2nd. Orders placed before 10 AM will ship on Friday.

Get your New Year off to a clean start!  ARS recommends Tergazyme detergent for cleaning latex AV liners and laboratory ...
12/31/2025

Get your New Year off to a clean start!

ARS recommends Tergazyme detergent for cleaning latex AV liners and laboratory glassware. This enzymatic cleaner is designed to break down protein (semen, sm**ma, blood, tissue debris...), and rinses away quickly. 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 (except New Year's Eve - we close at 2PM, and we are CLOSED on New Year's Day). We'll be back in the office, and shipping orders on Friday, January 2, 2026 - the Year of the Horse!

Pregnant mare keeping you up at night?  Our Predict-A-Foal test kit helps take the guess work out of foaling dates.  Usi...
12/30/2025

Pregnant mare keeping you up at night? Our Predict-A-Foal test kit helps take the guess work out of foaling dates. Using just a few drops of milk, the Predict-A-Foal tests check for changes in calcium and magnesium levels, enabling you to detect the difference between another routine night of gestation and a high probability that tonight's the night.
Predict-A-Foal test kits come with a useful guide to interpreting foaling signs and test results, and supplies to run 15 tests. Refill packs of test strips are also available in packs of 15 strips.

To order, please go to our website at: https://www.arsequine.com/predict-a-foal-test-kit

or give us a call at 1-800-300-5143, Monday - Friday, from 8:00 AM - 4:00 PM, Pacific Standard time (except New Year's Eve - we close at 2:00 PM, and we are closed on New Year's Day)

Want a second opinion? We also carry FoalWatch test kits!
https://www.arsequine.com/foalwatch-test-kit

Meconium is the first f***l matter passed by a newborn foal.  Generally dark greenish brown to black in color, this firm...
12/30/2025

Meconium is the first f***l matter passed by a newborn foal. Generally dark greenish brown to black in color, this firm, sticky mass should pass within the first 3 to 4 hours after birth. However, sometimes an impaction occurs which needs assistance to pass. Having Fleet e***as in your foaling kit is advisable. Persistent impaction may require administering an acetylcysteine (4%) e***a to break up the meconium allowing it to pass. This method should be under the recommendation of a veterinarian.

ARS carries Fleet e***as, and we manufacture the "E-Z Pass Foal E***a Kit" which contains 3 packets of the acetylcysteine doses, as well as a re-supply kit with 12 additional pre-measured packets.

To order, please go to our website: https://www.arsequine.com/e-z-pass-foal-e***a-kit

Or give us a call at 1-800-300-5143, Monday - Friday, 8:00 AM -4:00 PM Pacific Standard Time (**ARS will close at 2 PM on New Year's Eve, and we are CLOSED on New Year's Day).

ARS will be open on New Year's Eve until 2 PM, however there will be no shipping available on Wednesday, December 31, 20...
12/29/2025

ARS will be open on New Year's Eve until 2 PM, however there will be no shipping available on Wednesday, December 31, 2025 or Thursday, January 1, 2026. Orders placed after 10 AM on Tuesday will ship on Friday, January 2nd.

ARS will be closed for New Year's Day, Thursday, January 1, 2026. We'll be back in the office on Friday, January 2, 2026 at 8:00 AM.

Haha!  Happy holidays!
12/29/2025

Haha! Happy holidays!

Kicky Brand, humor for horse people and those trying to get rid of all those leftover candy canes.

ARS designed our "E-Z Squeeze" foal rope to administer the Madigan Squeeze Technique for "dummy foals" affected by Neona...
12/26/2025

ARS designed our "E-Z Squeeze" foal rope to administer the Madigan Squeeze Technique for "dummy foals" affected by Neonatal Maladjustment Syndrome. There is an excellent description of this condition, and treatment in our 2024 Foal Formulary and Field Protocol Guide. Colorado State University also created a video demonstrating the Madigan Squeeze Technique. https://www.youtube.com/watch?v=-oxGVrRzCYI

More recently, the technique has been shown to work on calves with similar symptoms. Click below for an article on treating dummy calves with the same technique: https://www.bovinevetonline.com/news/veterinary-education/weak-calves-may-need-big-squeeze?fbclid=IwY2xjawO7m41leHRuA2FlbQIxMQBzcnRjBmFwcF9pZBAyMjIwMzkxNzg4MjAwODkyAAEe7kELqx-M1W7Fa8KM21tMbewfxrHIMi5bcJpA7sKSZhsKCUhjd4WY9I2sGIA_aem_b61mO0oHVED6olKJIwJT9w

To order an E-Z Squeeze, 2024 Foal Formulary, or any number of other useful items for foaling season, go to: www.arsequine.com, or give us a call at 1-800-300-5143.

Foaling season is almost here!  Are you ready for it?Preparation is key to successful foaling.  Our ARS Standard and Del...
12/26/2025

Foaling season is almost here! Are you ready for it?

Preparation is key to successful foaling. Our ARS Standard and Deluxe Foaling Kits are designed to have the supplies you'll need collected into one box, ready for action in your foaling barn.

From a really great nasal aspirator, to obstetrical straps, our kits are filled with the tools needed for normal presentations, as well as supplies to assist with complications.

Both of our foaling kits include a copy or our recently released "Techniques in Equine Reproduction, 7th Edition" textbook, written by Dr. Patrick McCue, which contains several chapters on broodmare care, the foaling process, and care of the neonatal foal.

To order a foaling kit, or add supplies to your existing one, go to our website: https://www.arsequine.com/deluxe-foaling-kit2
or give us a call at 1-800-300-5143. We're in the office from 8:00 AM - 4:00 PM Pacific Standard Time, Monday through Friday (though we will be closed New Year's Day).

Merry Christmas Eve from ARS!We will be closed at 1:00 PM PST on December 24 until we're back in the office at 8:00 AM o...
12/24/2025

Merry Christmas Eve from ARS!

We will be closed at 1:00 PM PST on December 24 until we're back in the office at 8:00 AM on December 26. UPS and FedEx shipments will resume on December 26 as well.

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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