Helping the body fight disease™

Sass & Sass, Inc. is a veterinary biologics manufacturing facility regulated by the U.S. Department of Agriculture.

Our first approved product on the market is Polyprenyl Immunostimulant™, a therapeutic for feline rhinotracheitis (herpes) virus infection.

Polyprenyl Immunostimulant™ is a trademark of Sass & Sass, Inc., the product manufacturer.


About Us

Sass & Sass, Inc. is a private company located in Oak Ridge, Tennessee. The company was established in 1999 to develop and manufacture safe, potent, and efficacious treatments for pets. Many viral diseases in pets have no treatments. Being cat lovers, we focused on products that would help cats.

The first product, Polyprenyl Immunostimulant™, was conditionally licensed by the U.S. Department of Agriculture in 2012.

We are currently working on the studies in support of the licensure of other products.

Sass & Sass, Inc. is regulated by the U.S. Department of Agriculture and uses practices of good manufacturing. Since its inception, all products have been sourced and manufactured in the U.S. only.

Research and Development


Consulting with the USDA, Sass & Sass, Inc. has been designing and is getting ready to conduct a new FIP efficacy study in parallel with the study of Polyprenyl Immunostimulant™ for herpetic ocular disease.

FVR Research

Feline viral rhinotracheitis (FVR, FRV, FHV-1) is  a common and ubiquitous upper respiratory infection (URI). Polyprenyl Immunostimulant™ is a proven product for the treatment of Feline Rhinotracheitis.

FIP Research

Sass & Sass, Inc. together with the University of Kentucky, Tenessee and Dr. Alfred Legendre has conducted several studies for the use of Polyprenyl Immunostimulant™ for Feline Infectious Peritonitis.


115 A Flint Rd., Oak Ridge, TN 37830

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