About Us


Premier BioSource (formerly S&S Farms) was founded in 1987 by the father and son team of Carl and Tom Salayer and has always specialized in the production of high health status pigs for the biomedical industry.
Our goal is to consistently provide customers with the highest quality pig model. We ship our animals throughout the United States and Canada in our own climate-controlled vehicles. Delivery by commercial air via private courier is also available.

Premier BioSource maintains a Class A U.S.D.A. licensed closed herd that is managed on an “All in All out” basis to ensure the highest health standards possible. At both of our sites, the Domestic Pigs and Yucatan minipigs are raised within the same facility and are identical in health status. Both breeds being identical in health status allows them to be housed within the same air space at your facility.

Copies of health monitoring reports are available upon request.


Premier BioSource maintains two Yucatan and Domestic pig breeding herds. The original Yucatan and Domestics herds have been in Southern California since 1987. In 2005 a Yucatan grower inventory located in Southwest Michigan was added to serve the Midwest, East Coast and Canada. A breeding and grower facility was completed in 2020 and is located in Indiana. This new HEPA filtered, barrier facility was populated with cesarean derived colostrum deprived Domestic and Yucatan minipigs. In 2022 the new Indiana breeding facility completely replaced the Michigan grower facility.

Both of our locations have the advantage of being isolated from other swine herds providing excellent biosecurity for our animals. Facilities have been designed with the sole purpose to produce pigs for the biomedical and pharmaceutical industries. Both farms have biosecurity measures in place to promote animal health and well-being. Every aspect ranging from nutrition to environmental controls is continuously monitored.

Customer References

Customer references are available upon request.

Upcoming Events

Premier BioSource plans on attending AALAS 2024! Look for our booth, where you will be able to meet the owners and people who personally care for the pigs you receive. Whether you are an existing or new customer stop by so that we can hear feedback or answer questions about our pigs. You can find information regarding AALAS at www.aalas.org.

What’s New

In July 2023 S&S Farms, LP changed its legal entity to Premier BioSource, Inc. 

In July 2022 the new Indiana breeding and grower facility finished replacing the Michigan grower facility. This facility now breeds and supplies both Domestics and Yucatans from this facility to the Midwest, Eastern US and Canada.

In April 2020 S&S Farms began doing business as Premier BioSource. This was a change in name only, not in ownership or service. Premier’s customers can still expect the same people to be providing them with the highest quality swine model and service.

In March 2020 Premier Biosource completed construction on a new HEPA filtered barrier located in Indiana. This facility breeds, farrows and grows both Domestic and Yucatan pigs. The pigs that populate this facility were cesarean derived in 2019 from our California herd. We look forward to providing both Domestics and Yucatans from this facility to the Midwest, Eastern US and Canada. Having breeding facilities in both Southern California and Indiana, has enabled us to supply both Domestics and Yucatans to the continental US and Canada.

National Hog Farmer published this article in July 2020 that talked about the project.


Below is a small sampling of publicly available research articles in which swine from Premier BioSource/S&S Farms were used over the past 20 years.

Design and testing of a humanized porcine donor for xenotransplantation
Published online: October 11, 2023

Elamipretide mitigates ischemia-reperfusion injury in a swine model of hemorrhagic shock
Published online: March 18, 2023

Successful Islet Transplantation Into a Subcutaneous Polycaprolactone Scaffold in Mice and Pigs
Published online: December 22, 2022

Pharmacologic therapy for engraftment arrhythmia induced by transplantation of human cardiomyocytes
Published online: October 10, 2021

Multimodal characterization of Yucatan minipig behavior and physiology through maturation
Published online: February 06, 2021

Feasibility of a mini-pig model of radiation-induced brain injury to one cerebral hemisphere
Published online: February 06, 2021

Cardiac TRPV1 afferent signaling promotes arrhythmogenic ventricular remodeling after myocardial infarction
Published online: February 13, 2020

Biomechanical signaling and collagenfiber reorientation during distractionenterogenesis
Published online: September 14, 2019

Transcutaneous Ultrasound-Mediated NonviralGene Delivery to the Liver in a Porcine Model
Published online: September 13, 2019

Metabolic Response to Stress by the Immature Right Ventricle Exposed to Chronic Pressure Overload
Published online: September 3, 2019

Molecular pain markers correlate with pH-sensitive MRI signal in a pig model of disc degeneration
Published online: November 26, 2018

A porcine model to study the effect of brain death on kidney genomic responses
Published online: October 30, 2018

Intestinal lengthening via multiple in-continuity springs
Published online: October 23, 2018

Double plication for spring-mediated in-continuity intestinal lengthening in a porcine model
Published online: September 11, 2018

Blood volume measurement using cardiovascular magnetic resonance and ferumoxytol: preclinical validation
Published Online: September 10, 2018



CaMKII inhibition in human primary and pluripotent stem cell-derived chondrocytes modulates effects of TGFß and BMP through SMAD signaling
Published Online: September 8, 2018

Mapping molecular landmarks of human skeletal ontogeny and pluripotent stem cell-derived articular chondrocytes
Published Online: September 7, 2018

Dual therapeutic functions of F-5 fragment in burn wounds: preventing wound progression and promoting wound healing in pigs
Published Online: October 13, 2017

Fibromodulin reduces scar formation in adult cutaneous wounds by eliciting a fetal-like phenotype
Published Online: January 1, 2016

PTH Induces Systemically Administered Mesenchymal Stem Cells to Migrate to and Regenerate Spine Injuries
Published Online: February 1, 2016

Gold Nanoparticle-assisted Selective Photothermolysis of Adipose Tissue (NanoLipo)
Published Online: November 6, 2014

Evaluation of Microcollimated Pars Plana External Beam Radiation in the Porcine Eye
Published Online: February 21, 2011

Multiple abnormalities of myocardial insulin signaling in a porcine model of diet-induced obesity
Published Online: February 1, 2010

Oxazolone-Induced Delayed Type Hypersensitivity Reaction in the Adult Yucatan Pigs. A Useful Model for Drug Development and Validation
Published Online: August 21, 2009

Vulnerable Plaque in a Swine Model of Carotid Atherosclerosis
Published Online: March 11, 2009

Effect of Risedronate in a Minipig Cartilage Defect Model with Allograft
Published Online: October 16, 2008

Swine Model of Carotid Artery Atherosclerosis: Experimental Induction by Surgical Partial Ligation and Dietary Hypercholesterolemia
Published Online: October 10, 2006

Pseudotyping of Porcine Endogenous Retrovirus by Xenotropic Murine Leukemia Virus in a Pig Islet Xenotransplantation Model
Published Online: July 4, 2005

Sensitive and rapid isocratic liquid chromatography method for the quantitation of curcumin in plasma
Published Online: October 3, 2003

Long-Term Insulin Independence following Repeated Islet Transplantation in Totally Pancreatectomized Diabetic Pigs
Published Online: January 2002

Frequency Analysis of Ventricular Fibrillation in Swine Ventricles
Published Online: December 13, 2001