I agree with Carrie. My previous two dogs were put on a long line (for potty time) the first several years of their life. Eventually after they matured, they learned how to stay in their own yard. The third (the infamous Hannah) was difficult to housebreak, so I generally took her out myself on a longer leash (20 ft) for elimination. As it was apparent that she could never be trusted to stay in her own yard, we fenced in our back yard when she was three years old. It was a lot of work taking her out 4 - 5 times a day for three years, but it meant that she didn't run away, she didn't bark excessively, and she eventually was housebroken. These problems can be dealt with, but it often takes A LOT OF WORK. Your boxer is still young. Eventually she may learn to stay in her own yard without running away or barking, but not if she develops bad habits. Bad habits are hard to break. I never thought I would be taking a dog out to eliminate, but in the process of doing what had to be done, I discovered the joy of being outdoors very early in the morning, late afternoon, and at night. I learned to enjoy the cold and the snow, the wind and the rain, and see the stars in the sky. My back yard became a part of my home that I actually used. As my Hannah chased the blowing leaves, I enjoyed the simple pleasures of nature with her. The pleasure being together out of doors was something we both enjoyed. So my advice is get that long tie out and put her on it. Also you might try going out with her on a longer leash several times a day. Maybe like me, you will discover a deepening bond with your dog and the wonders of nature.