I think it’s obvious that you want to look professional and that includes your clothing, shoes, handbag (if you’re a female), and hair. Dreds can certainly be professional as long as they are neatly pulled back off your face and of course pulled up when participating in patient care (as I think all long hair should be pulled up while administering patient care – and I have LONG hair). Now, I don’t have dreds but one of my fellow graduates in my RN program does and she received a job offer without any problems and is happily working at a LTC facility. There are always going to be people that find a reason to judge someone else but I don’t think your dreds are going to hinder you. Good luck!