u/Best-Engineer-7703

I don't know how this happened, but I'm 90% sure one of my rats thinks my fingers are food or food dispensers. He's shown no signs of fear or aggression, but he keeps trying to gently take my fingers away like he does with his food, and has bitten me one time.

How am I meant to get him to stop thinking my fingers are food? I've had him for a week.