About Vet Supply Source Vet Supply Source, a division of J & B Medical Supply Co. Inc., was started in Michigan over 10 years ago at the request of many of our clients looking for a reliable source for their veterinary supplies at discounted prices. Vet Supply Source customers enjoy one of the most competitive pricing programs in the nation for their veterinary medical supplies, pharmaceuticals, and nutraceutical needs. Simply, J & B is willing to provide the best customer service at the best possible pricing. At J & B we hope to work closely with you to provide superior products at great prices.