I own a pit bull terrier and I got her when she wasd 2 years old. I was led 2 believe that she was fully trained but when I got her home I soon realised this was not the case. She is not a bad dog but she has a habit of pulling on the lead and jumping on people when they come to my house. She also doesn't pay attention to simple commands such as lie down or going to her bed. Can you give me some advise on resolving these issues please?