PetSmart Inc. and a former employee who alleges the company did not try to find a way for her to continue working after she injured her back must battle it out before a jury, a federal judge ruled.In a written opinion last week, U.S. District Judge William T. Hart denied separate motions filed by PetSmart and Cynthia Kottke seeking summary judgment on the failure-to-accommodate claim Kottke brought under the Americans with Disabilities Act.Kottke maintains she could have performed her duties as a fish health-care associate …