Detection of prohibited substances and permissible therapeutic drugs in livestock show or competition animals using liquid chromatography/mass spectrometry. This test is not available for horses intended for racing, whether in training or competition. This test is intended for groups of animals participating in shows or competitions. TVMDL may perform Drug Screen – Unknowns (1544) on any submission that does not appear to meet that criteria (e.g., single animal on a submission, no reference to recent show/competition).