[gumbysuz]

To teach, at first, you ring the bell by nudging it with nose or paw. Every time you take her out to potty, this has to happen. Use a verbal command to reinforce ("time for potty; let's go"). Then, out you go for potty and a reward. Just when you are about to give up, you will hear the bell and think OMG, she rang the bell! Good Luck!