- Brome Agri-Sales
 - Products include equipment for pig breeding, animal feeding equipment, and manure separators. - Circle Four Farms
- Producer of pork under the Farmer John signature.
 Clarke Bros
- Manufactures pig feeding equipment, swill masters, and wet mixers.- Clayton Agri-Marketing, Inc.
- Supplier of cattle, swine and more.
- Coolhog
- Drip and spray cooling systems for pigs.
- Dalland Value Added Pork Inc.
- High health swine breeding stock company, supplying a hybrid pig with Dutch genetics.
- Illini Feeds
- Offers a range of hog production services including contract livestock feeding, management, rental buildings, feed manufacturing, milling, nutritional consulting, and more.
- MidwestShowpigs.com
- Listings of showpig breeders and sires, summer fairs, and boar studs.
- Ontario Swine Improvement Inc.
- Genetic improvement services, test field services, home test carcass evaluation programme, DNA testing.
- Pig Improvement Company
- PIC is a pig breeding company servicing pig farmers and the food industry.
- Prairie State Semen Supply
- Offers semen on seven breeds and crosses.
- PureLean
- Supplier of organically grown pork and organic compost.
- RBR Biomedical
- Swine-producing facility that raises pigs to be used for research and development.
- S&S Farms
- Offers swine for biomedical research.
- Sand Livestock Systems
- Designing, building and managing swine facilities.
- ShowPig.com
- Dedicated to the swine showing industry.
- Swine Management Services
- Supplies management services to the swine industry.
- Swine.net
- Centre of resources and information for the swine industry, linking producers with products and services.
- ThePigSite.com
- Provides articles on health, reproduction, production and management, industry news, discussion forums, and business directories, as well as consulting services.
- Walker Show Pigs
- Includes pictures.
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