Hello all, I am after some advice, Barney who is now 15 weeks and likes to bite everything, which i know is quite normal as he is a puppy, i can handle him biting my hands and fingers as i just say "no" and give him one of his toys to play with. However my problem is that if the kids are lying on the floor then he will bite there hair and nip at there face, i know he is only playing but the younger 2 (2 and 5) are getting a bit upset. I have just been moving him away from the situation and telling him "no", i have also tried to explain to the children that they also need to tell him no. Is there anything i can do to stop him doing this, will he grow out of it? I am worried that he will become agreesive and i won't be able to trust him.