hello! i have a 11month old male corgi. hes a great dog very loving and all around good dog, although he does not listen. to "come" "drop it" "stay" etc. ive had his hearing check and he hears perfectly fine. hes been to doggie training class, we went for 10 weeks. ive diligently worked with him, using all the techniques i learned in class. but no luck. its gotten to the point where he needs to be on a leash constantly while hes in the house. does anyone have any advice on what i can try to help get this under control. he also has a bad habbit of jumping n bitting!