The Brandywine Valley SPCA hopes to vaccinate more than 500 pets during a free clinic in Harrington Saturday. Photo/BVSPCA. The Brandywine Valley SPCA will hold a free pet wellness day on Saturday, March 12 at the Delaware State Fairgrounds in Harrington. Two doggos await their vaccination during a previous BVSPCA drive-thru clinic. The event will run from 10 …