Personally if he is 3yrs and you are having problems getting him to walk. I would neuter him and move on. Not all dogs have the personality to be in the show ring. If he is bitting you and not respecting you as his master, you have way more problems then training for the show ring. My 4 and 5 month olds were already in a ring somwhat behaving. They are pups, and I allow them to smell and get the idea. First show for both. He should have at least already been to matches at least. Even a couple local shows already in my opinion. You need to get a perfessional trainer to help you basic obediance first.
I feel the first step to to actually get an x-pen for her during the day. Put her food, water, toys, small crate w/bed, and weewee pad in there. She will probably be happier there, and more inclined to eat. This becomes her happy place. It also has a bit more space for her to able to get up and be around. Use only a small crate for bedtime.