I spent 4 weeks with my dog and trainer before we were "officially paired." There were many things they checked and taught me about handling the dog. Sometimes people think I am harsh when I correct her, but I cannot have her regress. (And a correction is just a "NO" and repeat what she needs to do in a stern voice.....not hitting, etc.) It rarely happens but I liken it to an older child testing his parents to see if he can get away with something he knows is wrong.