Our 10 week old wheaten terrier is a jekyl and hyde monster, cute as a button sometimes but nasty at others. He doesnt just nip he sometimes snaps aggressively and often draws blood. Yelping worked for a day or two, but now that just eggs him on, I think he might be a bit of a bully! I've resorted to playing the dominant mother role, growling and restraining him, probably not good but we are at a bit of a loss otherwise. He has his first puppy class tomorrow, hoping that will help, he is a lovely dog at times but neither of us like him much at the moment! Its worse when he is hungry, but its not acceptable at any time. We are also going to start with the bitter apple spray. Its possibly being made worse by my partner and I not being consistent. Perhaps we need a clearer strategy? Is it sensible to initially allow mouthing but try restrict biting? Maybe we are confusing and frustrating him with a no bite at all policy? He sometimes seems to no know what to do with himself.