Our DooBee is 13wks and has seemed to have a finger biting problem from the day we met.
To correct the behavior, we do not use fingers in the manner of playing “spider” at any time. Fingers are always together in a soft touch.
To prevent biting,nipping when petting, a “pet” command works wonders!
DooBee sits in front of me, focuses on a treat in front of her nose while petting the top of her head, and using the command “pet” which means to sit still while someone touches her. I started with just a stroke or two and move up to more as her actions allow. She receives the treat just before I think she wants to focus on something else.