Hi, I have a 11 week old Japanese Spitz. He's learning not to nip and take treats gently, he knows already his teeth hurt. So far he had been great. Normally when he comes back home we wipe his paws because they are muddy, whilst holding him up in our hands and it has worked fine. Today when I put him down and held his paws gently to wipe them, he put his teeth on my hand to threaten me to get my hands off him or he will bite. I am still surprised and upset that he's trying to threaten me with his teeth. I tried to clean his paws again whilst he's on the floor and once again he put his teeth on my hand and tried to threaten me. I picked him up and isolated him instantly. I don't normally punish him, it's the first time I isolated him for acting like this. Everything else is positive reinforcements, which has worked. I don't know if I did the right thing, and I'm simply just really sad that he tried to threaten me. Does anyone know how to stop this behaviour? I would like him to just allow me to clean his paws without him threatening to bite me..