Patterson Companies Second Quarter Conference Call Scheduled for November 21, 2007

Patterson Companies (Nasdaq:PDCO) today announced that it will hold its conference call to review operating results for the second quarter of fiscal 2008 on Wednesday, November 21 at 10:00 AM Eastern. The second quarter earnings release will be issued before the market opens that day. Investors can access a live webcast of the conference call by visiting the investor relations section of the Patterson Companies website, www.PattersonCompanies.com. The webcast will be archived on Patterson’s website. Following the conference call, a replay will be available at 303-590-3000 with the 11102301 confirmation code through November 28. About Patterson Companies, Inc. Patterson Companies, Inc. is a value-added distributor serving the dental, companion-pet veterinarian and rehabilitation supply markets. Dental Market As Patterson’s largest business, Patterson Dental provides a virtually complete range of consumable dental products, equipment and software, turnkey digital solutions and value-added services to dentists and dental laboratories throughout North America. Veterinary Market Webster Veterinary is the nation’s second largest distributor of consumable veterinary supplies, equipment and software, diagnostic products, vaccines and pharmaceuticals to companion-pet veterinary clinics. Rehabilitation Market Patterson Medical is the world’s leading distributor of rehabilitation supplies and non-wheelchair assistive patient products to the physical and occupational therapy markets. The unit’s global customer base includes hospitals, long-term care facilities, clinics and dealers.