Hi there,
When Senorita was a puppy she was a BIG nipper!
I hated it , but we kept on telling her no, then finally we would just ignore her and she would learn if she wanted to get close she had to stop nipping , 2 yrs later she is mostly fine, once in a while she will start up, but same thing we have to ignore her then she will stop, either that or my Rott will put her in her place, thats usually does the trick ASAP. But, her nipping isnt a mean thing its more playful but still annoying and bothersome.