Does he snap at you? If not, I was given good advice once from someone on this board. My oldest, then 2 yrs old male, would growl and snap at my 6 yr old grandson. I sat on the floor with one on each side and let JPop, the yorkie, know that I was not going to let him get to Jacob; in other words, be the dominate one. Also, when he would growl, I would grab him by the back of the neck, like mamma dog would do, and growl right back at him. Then I would put him on his back until he relaxed and looked away. Just try to be strong and don't let him sense you are scared, worried or stressed over him. Hope all works out for you. I really feel for you, you can't let him hurt your child!