Yes flush with cold water first. Then try some enzymes like ashbys enzyme spotter, enzall, pre enzyme solution etc and rinse with cold water then try some acid at around 8-1 or something like urine spotter or even pet stain spotter from craftex and extract with cold water and if its not gone by then try some dye gone, dye x or sod mets. If none of that work then go home and give up....