My 2 year old has been biting her nails and even her toe nails. They're so short from chewing i cant trim them at all but i cant get her to stop. We've tried a sticker chart as a reward for not chewing and i have painted her nails and told her she cant bite them when they're painted. It kind of works but then she'll forget and slip back into it.

Any advice? She never took a binky, i thought maybe i could introduce something else for her to chew on but i dont know what