Our little guy is 9 1/2 weeks old and he seems to be getting aggressive toward my 1 1/2 year old son. My son has been very good with the puppy, he doesn't bother him, just watches mostly. Reesie (the puppy) keeps running and jumping on my son and biting at his clothes and growling. He does not act this way toward my other two kids (7 and 9). I've tried having my son feed Reesie and he has done a good job. I tell Reesie to sit and then let my son feed him a piece or two of his puppy food. I thought maybe this would help Reesie see that my son is dominant over him, but I'm not sure it is working. I know that Reesie is still young, but I'm just wondering what I should do to nip this, or if this is just normal puppy behavior??