Bit of advice please. I have 2 older labs aged 7 and 2 and a puppy of 10 weeks. The issue is that our puppy keeps biting the other dogs and making them yelp. They will paw him to get him to stop but dont growl or give a warning nip back. My question is should i be intervening and stopping the biting by seperating him from the other 2. Or do i need to let them get to a point where they tell him off. Thanks in advance for any advice