Teaching Hold & Heel...

Pups teeth are all in, she hasn't picked up a bumper since she started teething. She runs to the mark and runs straight back, with no bumper. I started two days ago about five times twice a day, just putting on leather gloves, inserting one hand in her mouth and holding the bottom jaw a little, saying "hold" and petting her. She sits there fairly calmly, after a little bit she starts trying to push my hand out and then the next time it is a little harder to get my hand in her mouth. But I can still do it. She squirms a little in opposition. I just want to make sure I am starting this process correctly.

Also, from remote sit to heel, she runs pretty stinking fast back in, but she tries to either knock me over or go to my right side as oppose to my left. While walking on lead she is almost perfect (according to my standards). I can guide her to my left side when on a short lead, she knows where to go and what to do. But from about 40 to 50 yards out she bolts right to me and then goes either, like I said, at my legs or my right side. How do I correct this? What I have been doing is try catching her and swinging her to my left side.

Any advice would help for either problem. Thanks