do i have to give a drug test for dhs just caused my son never passed his

You should not be forced to submit to a drug test, but negative results can result.  There are not enough facts to give an answer to this question.  I'm not sure if you are a party to a CINA case or not or a criminal case or not.  If you are in a CINA case, the judge can order a test to be done, or lose your parental rights, children removed, or possibly face contempt.  If you are involved in a criminal case, you need to contact your attorney to protect your rights. If you are a party in a CINA case, you should have an attorney that you should consult and discuss this issue.  If DHS is merely investigating a case, DHS does not have the authority to order a drug test (but a judge does).  However, you can end up with children removed if you do not satisfy DHS.