I would say be very stern with her when you scold her. Stern enough that she does not try to put her mouth on you and instead cowers and backs down. She must think that chewing is a bad thing. If you have trouble with this, I would suggest you get some counseling regarding this. Obedience training is also something that will generally help you control her.
Golden retrievers are usually amenable to conditioning.
My next-door neighbor's kids can come by to take care of him after school. Leaving them for eight hours at a time is social isolation to them and probably not a good idea. I would suggest that the children could take him out and play with him and allow him to relieve himself, but make sure that they are old enough to be responsible and not allow him to get away and get hurt. The vet said it was probably herpes contracted while he was in the shelter, and there was nothing that could be done for it. This one is specific to cats.