My 9-month-old Rough Collie pup Sergeant is the sweetest, and rarely nips and loves to give kisses. One problem he has is he'll start licking while I'm snuggling with him/petting him and then he'll start nipping at the same time he is licking. He even does it to my younger siblings while licking their face and ears (usually when they are hugging/cuddling him) and I don't want him to accidently hurt them. How should I go about training him not to do this? I've been stopping cuddles/pets and saying a firm no. Tips and corrections would be greatly appreciated. Thanks!