My 5-week-old daughter has had diarrhea for 4 days. She has no fever and is drinking her usual feeds. Should I consult a doctor?

Based on the information provided, it does not appear to be necessary to consult a doctor urgently. It is recommended to continue monitoring the situation for a few more days, as it could be a minor virus that should pass within 3 to 4 days. Make sure the formula is properly diluted and that your child continues to have regular urination to prevent dehydration. If the situation remains the same after 3 to 4 days, then it would be appropriate to consult a doctor at that time.