My five year old bites his nail to the point they bleed. I have tried "polish" that you put on their nails that is very biter and will stay for days. It worked if I kept his fingers painted all the time. I ran out and ordered some more (what I bought in hair supply store was a joke!) but this time he eats his fingernails like like their candy. Have you moms out there had/have this problem and what did you do?