I seem to be having trouble quoting, but about your son’s dog pulling… I’m not sure how you feel about this, but a training collar works. I’m in much the same position- I am looking after my son’s German Shepherd until Christmas. Thor does listen to and obey James, but I was having trouble going for walks with him. It doesn’t help that he weighs 100 lbs. James agreed to this.
So- the training collar,also known as a shock collar- he wears it, and very occasionally (like once on a 30 minute walk) I press the button, he shakes his neck, and we resume having a nice walk. It has made a huge difference. It’s not terribly powerful, the dog is not seizing or anything like that.
I don’t like pressing the button, however, he’s much safer if he can be well behaved.
We actually went into Petsmart this week, and he was well behaved. 6 weeks ago, that seemed impossible. That reminds me, it’s time for walkkies!