PetSmart Inc. will cut ties with a supplier cited by the U.S. Department of Agriculture for multiple infractions, reports The Arizona Republic. The Phoenix-based pet supply retailer will no longer do business with rodent supplier Holmes Farm Inc. after the USDA cited the Pennsylvania company for several violations following a January inspection. The federal agency published a 10-page report last week that detailed unsanitary conditions, improper record-keeping, as well as numerous dead or diseased…