On Dec. 21, 2005, Standard&Poor's Ratings Services raised its corporate credit rating on specialty pet retailer PetSmart Inc. to 'BB' from 'BB-'. The upgrade is based on the company's improved operating performance and credit measures. Comparable-store sales increased 4.1% in the first three quarters of 2005, while operating margins expanded to 17.1% from 16.3% the year before. Operating performance has been driven by good execution and favorable industry trends. As a result, cash flow protection measures have continued to strengthen, withlease-adjusted EBITDA for the latest 12 months covering interest by 4.0x, and lease-adjusted debt to EBITDA at 3.0x. The outlook has been revised to stable. The ratings on Phoenix, Ariz.-based PetSmart reflect the risks associated with the company's