Can dfcs make you take a drug test without a court order?

My husband and i are raising 5 kids,from 3 up to 14,we are happy,steady and comfortable right now,DFCS called and said there was allegations of abuse,which there's no way,and pot smoking,we smoked the other day and now i'm terrified i'm gonna loose my kids! I've never been in a mess like this,can they make us take the drug test without a court order or even a case against us???