R.C.
Hi! I am having the same problem with my 3 year old daughter. I don't know if this will help or work, because I am still in the process of trying it on her. And there was progress, until about 3 days ago. Anyway, in a nice way, I told her that if she bites her nails they will look yucky and gross- and little pretty girls don't want yucky fingernails. I told her if she bites them we can't paint them and make them look pretty cause she'll bite it all off. She is really into princesses right now, so I even brought that into the conversation, telling her that I bet a pretty princess doesn't bite her nails cause they always have pretty painted nails. Whatever works, right? And then I also told her that if I did see her biting them, I would have to put vinegar on them to remind her that it is a yucky habit. I didn't want her to feel bad, so I was very nice about it. I am trying to keep it a positive thing, so hopefully it will continue to work. I had to put vinegar on them for the first time 3 days ago, and she didn't like that at all. I feal really bad doing that, so hopefully it only took the one time for it to really sink in- it was a good reminder cause she hasn't done it since. Good luck!