I have a 14 week old male staffie, he is generally well behaved and has been attending puppy classes for the last 4 weeks. The problem we have with him at the moment is that he is constantly using his teeth on us and will try to bite when you are putting his lead on, stroking him etc, he doesn't seem to be doing this aggressivly but I'm not sure what to do, any ideas?

I am no expert and I am sure that someone who knows the right answer will be along soon but I have a 15 week labrador and he is exactly the same and I just think it is all to do with teething and learning whats acceptable and whats not. We supply max with a million things he is allowed to chew andwhen he chews us or things we would prefer in one piece then we just say 'no biting' in a firm tone. He doesnt always listen but he is a million times better than he was a few weeks ago! Good luck I am sure it will pass

It is normal but he needs to know its not acceptable behaviour

He's a baby and it's normal however the "idea" is to let him know as Lel says it is unacceptable. Staff pups are normally quick to learn. But make sure if you can the whole family are working to the same rules. And that one or two  aren't letting him "get away" with what you consider unacceptable, and try to remember that what you may consider "funny/amusing" now is not going to be so when he's a grown dog. So consistancy is the key.

Karen