I didn't mean for him to intentionally make her gag. When Bella would bite we would push our hand into her mouth till it would cause her to back up. She might cough or gag a little, but it's not damaging like other forms of physical 'correction' like hitting them...das verah verah bad.
I tried the finger in the back of the mouth thing (across both sides of the jaw behind the teeth, not inward towards the throat). She looked at me like wtf? I did it a few times and then she just kind of went off and did her own thing for a while. So it might have worked. But in other news, just tonight she started showing symptoms of a possible urinary tract infection so now I gotta take her to the vet in the a.m.