I have 3 ccs all male 2 very lets call them drivy, i i totally agree with dennasmum, i have used tug as a training tool, i started when they were young, my children have all grown up but theres not a day that my house isnt filled with grandchildren, ranging from 3 months old to 7 years, my dogs will play tug with any of us the second we say drop, leave or enough they let go and instantly lay down, if a child goes near them when they have there tug toys or anything in there mouths they drop it and give it up to the child, this is done with persistent and continuous training from a young age.I usually agree with posts from you but this I feel I need to jump in as having first hand current experience with this.
Please don't use the tug game lightly. These dogs with drive are no joke and not an EM. Just to give you an idea my female CC has a tug toy, a special K-9 tug toy that we use for training and is used in IPO training. My wife can't even grab the toy around her because she goes ballistic when she even see's it. Mind you my CC is a heavy drive dog but its very possible the OP has a drivy dog also. If you used a tug toy with my girl she would take you down trying to get to it or get it from you and she is 60% trained from total IPO. They develop a certain attachment to the toy that is used in positive reinforcement. Similar to that of a sleeve or a canvas tug. I know people will say well she is out of control. This is false, this tug can be used during training which is her job and works very well. The tug works better than food in a positive training scenario that I use.
These are not your play tug for fun type of dogs (which iv'e done for 15 years before the CC). I'm sure there are other CC owners that will agree with this.
I believe this is serious enough for its own thread as I know there will be people that say oh no, I use with my mixed or my docile CC. But those with drivy CC know how serious a game of tug is. Here is one of the many articles on tug games with dogs. Please read #3 in the article. If this Op started to play tug with her 16 week old CC which is drivy, she would have more problems than she has now. These aggressive problems attacking her and the vet only show that this dog is a possible good candidate for bite work, which I can tell you right now with kids in her house I would go against this 100%. Less than 5% of CC owners have the ability to safely train in bite work imo and tug is the gateway to bite work in this breed.
Not only that, a CC is born a 40 caliber most people dont have a reason to make it a loaded 40 caliber.
http://thehyperpup.com/will-playing-tug-war-make-dog-aggressive/
This is just my opinion but your dog hasnt got theae traits because shesa cc this could be any breed as youve said shes 60 percent trained and i believe she needs a lot more work on this situation, not one of mine would do that but iv worked hard to make aure that doesnt happen.
I dont understand when you say its not an em its a cc, a drivy untrained em can be just as much a danger as a cc,
Please dont think im attacking your opinions im certainly not, i really wish you could meet my budcuss, you can and should be able to pick a favourite toy up from a cc without being knocked over or attacked when properly trained.