Zak, my 8 yr. old, and Gibson, 14 wks. were wrestling and playing yesterday as they normally do. We bought Gibby a new collar a couple of days ago and it is still a bit loose even on the tightest notch. I figured he would grow into it soon enough and I always remove it when he is crated, but he usually wears it during the day when I am around. All of a sudden Gibson starts yelping and howling and frantically freaking out. I look over and from accross the room it looks as if Zak has him by the neck and is shaking him! I immediately run over and try to separate them. This is when I realize Gibsons collar is caught on Zaks lower jaw and his lower canine teeth. Zak is just trying to get away and this makes it more difficult for me to separate them. He keeps backing up trying to free himself, while poor Gibson is being choked! I finally got them separated after which seemed like an eternity. (realistically it was probably 6 or 8 seconds) It really scared the heck out of me. I was worried that Gibson's neck / throat might be injured but he seems fine. Everybody please be careful about leaving your golden unattended with a collar on, especially a puppy whose collar might be a bit loose. I hate to think what might have happened if I wasn't close by. I know I am going to be more careful in the future.