My Dora aprox 8 months got upmon my head this morning and started rooting around in my hair she proceeded to groom me then sunk her claws in and started eating the dandruff I have at the center of my head and above each ear and she was agressively pulling at my hair to get to the dandruff is this normal behavior none of my other cats do that one will lightly groom my head now and then but that's it..should I allow her to do this or do I stop it now so it doesn't get to be a habit??