A legacy of health innovation for people and the pets they love.

Just like you, Bayer is committed to health and happiness – for you and your pet. A lot has changed over the last 150 years, including the evolution of the relationships we enjoy with our pets. But, the belief that our cats and dogs deserve healthy, comfortable and happy lives – just like the members of our family – has guided Bayer along the way.

Bayer History

By Year
Bayer Corporate
Bayer Animal Health
  • 1863
    Friedrich Bayer, founder
    Bayer AG is founded by Friedrich Bayer in Elberfield, Germany.
  • 1897
    Dr. Felix Hoffman, scientist behind Aspirin®
    Bayer scientist Dr. Felix Hoffman succeeds in synthesizing a chemically pure and stable form of acetylsalicylic acid, the active ingredient of what would soon become Aspirin®.
  • 1899
    Aspirin bottle from 1899
    Aspirin is registered as a trademark, and the analgesic hits the market to become a staple on the shelves of families across the world.
  • 1904
    Bayer employee Hans Schneider, known for his creative and innovative work, creates the Bayer Cross Logo.
    1904 Bayer Cross logos
  • 1919
    Cats and dogs begin moving into the house. This is why Bayer launched Neguvon flea and tick product, its first specific animal health product.
    Bayer employees working on developing Neguvon flea and tick product, the first specific animal health product launched by Bayer
  • 1923
    Bayer launches Naganol, the first veterinary product to combat blood parasites in animals.
    1923 Naganol logo
  • 1928
    Bayer logo updated in 1928, look still holds today
    The Bayer Cross logo is given a new and now familiar form.
  • 1948
    Bayer develops the first vaccine against foot-and-mouth disease.
  • 1968
    Bolfo, a product to protect small animals against fleas and ticks, is launched.
    Bolfo, flea and tick preventative for small animals, launched in 1968
  • 1974
    Bayer merges Cutter-Haver-Lockhart with Chemagro, a Kansas City-based agricultural chemical company, and names it Bayvet – short for Bayer Veterinary.
  • 1988
    A new generation of anti-microbials for the treatment of bacterial infections in dogs and cats launches under the trade name Baytril® (enrofloxacin) Tablets. A variety of Baytril® products are still on the market today.
  • 1989
    The Bayer Cross logotype and new corporate colors green and blue are added to the logo, and the company begins to utilize the Bayer name for all veterinary medicine and veterinary supply products on the market in the U.S.
    1989 Bayer logo with color
  • 1993
    Drontal® (praziquantel/pyrantel pamoate) Tablets for cats, a broad-spectrum dewormer, launches in 1993. In 1994, Drontal® Plus (praziquantel/pyrantel pamoate/febantel) Tablets broad-spectrum dewormer for dogs launches. Both are still on the market today.
  • 1996
    Bayer launches Advantage®, a breakthrough product in flea treatment, which evolved to become Advantage® II in 2011 when it added pyriproxfen to the formulation to more comprehensively target infestations and interrupt the flea life cycle at multiple stages. A family of Advantage® home, yard and premise products completes the Advantage® line today.
  • 2002
    2002 Bayer logo
    Bayer Cross becomes three-dimensional and incorporates the company’s colors.


    Bayer launches K9 Advantix® with protection from fleas, ticks mosquitoes. In 2011, Bayer launches K9 Advantix® II, a market-leading product with an additional active ingredient to also kill all flea life stages.
    Do not use on cats.
  • 2007
    Advantage Multi® (imidacloprid + moxidectin) is introduced to the U.S. market to provide broad-spectrum protection against heartworm disease, fleas and common intestinal parasites for dogs and cats.


    Bayer unveils Profender® (emodepside/praziquantel) Topical Solution, a deworming agent for cats.
    Profender® (emodepside/praziquantel), dewormer for cats, packaging
  • 2013
    Bayer reaches a new milestone with the launch of Seresto®, a collar designed with Sustained-Release Technology. It’s the first pet product to leverage research and development innovation across the Healthcare, Crop Science and Material Science divisions to prevent fleas and ticks in dogs or cats for 8 months.


    Veraflox® (pradofloxacin), oral suspension for cats, bottle and syringe
    An innovative antibiotic, Veraflox® (pradofloxacin) Oral Suspension for Cats, designed specifically for the needs of cats is introduced.


    Bayer acquires Teva Animal Health in the continuation of efforts that further strengthen and broaden the range of pet care solutions in the U.S. Bayer now offers a full line of dermatology products, nutraceuticals, gastrointestinal products, anti-infectives, anti-inflammatories and reproductive hormones.


    Bayer celebrates its 150-year anniversary with numerous events for employees across the world. Highlights include employee versions of their own “My Bayer Story,” a cross-continent voyage of “The Bayer Airship,” an experiential anniversary mobile tour and more.
    Bayer: 150 Years, Science For A Better Life logo
  • 2014
    Bayer introduces quellin® (carprofen), the first soft chewable formulation of the leading veterinarian-prescribed non-steroidal anti-inflammatory drug for dogs.
    quellin® (carprofen), soft chewable for osteoarthritis in dogs, packaging

Save on Bayer products today.

Help prevent fleas, ticks and more — for less.


Looking for Bayer products?

See where to buy them in your neighborhood.


The best is
yet to come.

Register now for special product offers, timely news, tips and more.

CAUTION: Federal (U.S.A.) law restricts the following drugs to use by or on the order of a licensed veterinarian: Advantage Multi® for Cats, Advantage Multi® for Dogs, Baytril® Tablets, Drontal® Plus Tablets, Drontal® Tablets, Profender® Topical Solution, quellin® and Veraflox®.